Running
Up and Under Trail Running
Welcome to the Trail and Ultra Running section of our website. Up and Under in Cardiff has been supplying fell running specific footwear for years, but has expanded into the wide ranging and glorious world of trail running in the past 10 years. We have a close working relationship with a number of trail and ultra race organizers in the area, most notably Run Walk Crawl, Ridge Runners and Up Hill Down Dale and have therefore expanded our range to cover Ultra Running products that can help you race on all terrains, through day and night, for 4 seasons of the year.
A lot of our core clothing ranges and equipment such as headtorches, first aid kits, whistles, etc. are equally appropriate for trail-running so don't forget to take a look around those sections or use our search if what you need isn't immediately obvious within this part of our catalogue.
We select the best trailshoes, packs, poles, vests, torches and clothing from baselayer through socks, shorts, tights and insulation to windproof and waterproof shell, hats and gloves and we have what you need for all your fell and trail-running needs, all carefully selected by our staff with insights from Run, Walk Crawl to suit you. It's all from the best brands, but see the quick links below to rapidly access some of our most popular. It's also worth having a browse outside of running through our Odlo range for extra warm quick drying, high wicking, lightweight base and midlayer clothing and everything beyond.
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OMM Ltd
Core Zipped Vest
The OMM Ltd Core Zipped Vest is an ultra-light, breathable running layer designed with innovative PrimaLoft Insulation. This unique active insulation layer combines the warmth of a fleece with less than half the weight, maintaining insulation even when wet. When paired with a shell jacket, it provides remarkable warmth, but its high air permeability lets a breeze easily cool you down, making it ideal for maintaining comfort as you warm up. Keep your Core layer on for effortless thermoregulation - just adjust your outer shell, for example the 49g Sonic windproof, to stay in control of your temperature.
OMM Ltd
Core Beanie
The OMM Ltd Core Beanie is a close-fitting beanie, made with innovative PrimaLoft® ACTIVE insulation, offers exceptional warmth in a lightweight, packable design. This cutting-edge material weaves industry-leading insulating fibres through a fine mesh, delivering down-like performance that stays warm even when wet. Perfect as a standalone piece or paired with a windproof layer to trap heat effectively, it’s an essential for staying warm on the go.
OMM Ltd
Core+ Hoodie Women
The OMM Ltd Core+ Women's Hoodie is an ultralight, versatile hoodie designed to keep you warm from valley to summit. Using innovative Primaloft® Active insulation, this hoodie is perfect for long winter runs, camping, or tackling freezing days in the mountains. The entire OMM Core Range is made from Primaloft® Active fabric, which combines synthetic insulation woven through a breathable mesh. This gives you the warmth of a fleece at less than half the weight. When paired with a shell, the Core+ becomes an incredibly efficient insulator, allowing excess heat to escape with ease. It’s the ideal layer for active, cold-weather adventures.
OMM Ltd
Flash Winter Tight Women's
The OMM Ltd Flash Winter Tight Women's are expertly designed with a blend of fabrics to deliver targeted insulation and ventilation for optimal performance in cold conditions. Lightweight polyester stretch fleece is strategically placed on the front of the thighs and lower legs to shield areas most exposed to the elements. Meanwhile, lighter Flash fabric panels enhance ventilation and provide unrestricted movement. Weighing just 220g, these full-length tights are the ideal choice for winter ascents and extended days in the hills.
OMM Ltd
Flash Tights 1.0
The OMM Ltd Flash Tights 1.0 are the ultimate choice for runners tackling tough conditions. Built with durability and flexibility in mind, these tights feature OMM's innovative patterning that hugs the body without holding you back. Instead of a single fabric cut, strategically placed body-mapped panels allow for a closer fit with less Lycra, enhancing breathability and temperature control. The Flash series keeps you comfortable with superb moisture-wicking and quick-drying capabilities, plus 4-way stretch for optimal freedom. Slimline thigh pockets provide convenient storage for essentials like gels, a compass or a map, making these tights a versatile choice for any run.
Darn Tough
Men's Run No Show Tab Ultra-Lightweight Running Sock
The Darn Tough Men's Run No Show Tab Ultra-Lightweight Running Socks have been expertly designed to elevate your running performance. Featuring a silky, chafe-free cuff, high-performance flex zones and a supportive fit, these premium running socks ensure maximum comfort for marathon distances and all-day wear. Made with ultra-lightweight, moisture-wicking Merino wool, they keep your feet dry, cool and blister-free mile after mile. Perfect for serious runners seeking durability and performance in every stride.
Darn Tough
Men's Run No Show Tab No Cushion Ultra-Lightweight Running Sock
The Darn Tough Men's Run No Show Tab No Cushion Ultra-Lightweight Running Socks are engineered for runners who demand performance and comfort. With a sleek, streamlined design and silky, chafe-free cuffs, these socks deliver irritation-free wear. Crafted from ultra-lightweight, moisture-wicking Merino wool, they ensure your feet stay dry and comfortable, while high-performance flex zones provide a secure, supportive fit. Designed for all-day comfort, these running socks help you push your limits and go the extra mile.
INOV8
Thermal Mitts
The Inov8 Thermal Mitts are the ultimate waterproof and insulated running mittens for long runs in cold and wet winter conditions. Primaloft Gold insulation Active+ works to keep your hands warm in the coolest of conditions, while also working to transfer moisture and sweat away from your skin. They feature both a waterproof inner and a durable Water Repellent PFC-free coating, so you're sure to stay dry in even the heaviest of downpours. Silicone grip on the palms make handling poles and other accessories more secure, plus they're phone and touch-screen compatible! The Inov8 Thermal Mitts will keep you dry, warm and comfortable, allowing you to run further.
INOV8
Waterproof OverMitts
The Inov8 Waterproof OverMitts will keep your hands warm and dry in cold winter conditions. They can be worn alone or over another pair of gloves for added warmth and are the perfect choice for part of your mandatory race kit. These lightweight and waterproof mitts pack down small enough to fit into the rear pocket of your chosen running legwear and have handy wrist loops to reduce the risk of dropping or losing them. A reflective logo enhances your visibility to other road users in low conditions.
INOV8
Performance Long Sleeve T-Shirt Women's
The INOV8 Performance Long Sleeve T-Shirt Women's is an ultra-lightweight and quick-drying running top, perfect for wearing alone or as part of a layering system in colder weather. It features a streamlined fit and is crafted from technical stretch fabric, allowing for full freedom of movement during runs. Its moisture-wicking properties help keep you cool and comfortable during intense sessions and races. For added warmth on colder days, the integrated thumb loops can be pulled over your hands or gloves.
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INOV8
MudTalon Men's
The INOV8 MudTalon Men’s is a rugged trail and fell running shoe designed for soft, muddy, and mountainous terrain. Featuring aggressive 8mm talon-like studs for unbeatable grip, a flexible Rock-Plate for underfoot protection, and a breathable ballistic nylon upper, it's been built to handle tough conditions. The wide fit offers extra toe room, while the Met-Cradle lacing system ensures a locked-in heel. With a responsive POWERFLOW PRO midsole for long-distance comfort and ground feel, the MudTalon delivers traction, cushioning, and control in every step.
INOV8
Softflask 0.5 with 10 Tube
The INOV8 Softflask 0.5 with 10 Tube is your go-to, ultra-versatile hydration companion, perfect for carrying up to 500ml of water or energy gels. Just give it a squeeze to sip, and watch it automatically compress to eliminate air and minimise bounce. With its sleek and lightweight design, the SoftFlask keeps you hydrated without weighing you down, making it an essential for every adventure.
INOV8
Performance Short Sleeve T-Shirt Men's
The INOV8 Performance Short Sleeve T-Shirt Men's is a lightweight and breathable running top designed for speed on the trails. Its quick-drying fabric and streamlined silhouette offer a close, comfortable fit that encourages pushing the pace. The stretch fabric allows full range of motion for dynamic movements like intervals, hill climbs, or sprint finishes. Built to last, this performance tee also features an antimicrobial treatment for long-lasting odour resistance, ensuring durability and freshness over time.
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INOV8
TrailFly Women's
The INOV8 TrailFly Women's are a great shoe for everyday training and longer trail races across hard, rocky ground. Featuring a brand new anatomical shape, the Trailfly hugs the natural contours of your foot, locking in at the heel and widening at the toes for a secure and comfortable feel. They feature 4mm rubber studs that are perfect for gripping onto rock and hard-packed dry ground. A flexible Meta-Shank rock plate protects you from painful sharp rocks and tree roots underfoot, allowing you to move confidently over the most challenging of terrains. Ideal for summer and dry weather trail running, the Trailfly is a comfortable everyday training shoe that you won't want to take off.
INOV8
TrailFly Men's
The INOV8 TrailFly Men's are a great shoe for everyday training and longer trail races across hard, rocky ground. Featuring a brand new anatomical shape, the Trailfly hugs the natural contours of your foot, locking in at the heel and widening at the toes for a secure and comfortable feel. They feature 4mm rubber studs that are perfect for gripping onto rock and hard-packed dry ground. A flexible Meta-Shank rock plate protects you from painful sharp rocks and tree roots underfoot, allowing you to move confidently over the most challenging of terrains. Ideal for summer and dry weather trail running, the TRAILFLY is a comfortable everyday training shoe that you won't want to take off.
INOV8
Racepac 20
The INOV8 Racepac 20 has been designed for enduring comfort on extended trail outings. With a capacity of 20 liters, it accommodates fluids, gear, and nutrition with its 11 pockets—ideal for multi-day adventures and long-distance runs. Ultra-runner Jack Scott relied on this pack during the 2024 Spine Race, where he set a new course record, besting the previous time by 10 hours. Sustainability is a core feature of all Inov8 packs, including the Racepac 20, which incorporates recycled materials and is engineered for longevity and easy repair. It's a reliable companion built to last through years of use.