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Synthetic Filled Clothing Products

Special Offer £223.99 (inc Vat)
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Outdoor Clothing Synthetic-Filled-Clothing Synergy Featherless Jacket Womens Marmot
Synergy Featherless Jacket Womens

The waterproof Women's Synergy Featherless Jacket is made for tackling epic adventures and tough tracks in unpredictable, cold weather.

Special Offer £223.99 (inc Vat)
You save 30%
Outdoor Clothing Synthetic-Filled-Clothing Synergy Featherless Jacket Marmot
Synergy Featherless Jacket

Waterproof and Warm, what more could you want? The Marmot Synergy Featherless has it all. The GORE-TEX® fabric and PFC-free, water-repellent finish will keep you dry and comfortable even when you wear this insu...

£222.50 (inc Vat)
You save 11%
Outdoor Clothing Synthetic-Filled-Clothing Solaris Jacket Marmot
Solaris Jacket

Gore-tex waterproof membrane and active synthetic insulation with large front zip pockets.

£222.50 (inc Vat)
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Outdoor Clothing Synthetic-Filled-Clothing Women's Solaris Jacket Marmot
Women's Solaris Jacket

Gore-tex waterproof membrane and active synthetic insulation

£214.84 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing Atom AR Hoody Women's Arc'teryx
Atom AR Hoody Women's

The Arcteryx Atom AR Hoody Women's is significantly warmer and more protective than a fleece jacket. This insulated hoody is breathable enough to be used as a super warm mid-layer in cold conditions and protect...

£204.70 (inc Vat)
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Outdoor Clothing Synthetic-Filled-Clothing Avant Featherless Hoody Marmot
Avant Featherless Hoody

Warm and durable with 100% Nylon PreBaffle Plain Weave Heather outer and recycled featherless insulation is made with 75% recycled loose-fill fibers that feel just as warm as 700 fill power down.

£196.13 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing M's Nano-Air Hoody Patagonia
M's Nano-Air Hoody

Patagonia M's Nano- Air Hoody is a light, warm, breathable, comfortable insulation piece, perfect for mountaineering, alpine climbing, hiking and other outdoor activities

£187.66 (inc Vat)
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Outdoor Clothing Synthetic-Filled-Clothing Proton LT Hoody Men's Arc'teryx
Proton LT Hoody Men's

£187.66 (inc Vat)
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Outdoor Clothing Synthetic-Filled-Clothing Proton LT Hoody Women's Arc'teryx
Proton LT Hoody Women's

£179.17 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing Atom LT Hoody Men's Arc'teryx
Atom LT Hoody Men's

Ultimate synthetic jacket for all activities and year round use and an Up and Under staff favourite.

Special Offer £174.99 (inc Vat)
You save 30%
Outdoor Running Running-Clothing Running-Insulation M's Micro Puff Hoody Patagonia
M's Micro Puff Hoody

Super light synthetic filled hoody that gives the warmth for weight of high quality down.

Special Offer £174.99 (inc Vat)
You save 30%
Outdoor Clothing Synthetic-Filled-Clothing W's Micro Puff Hoody Patagonia
W's Micro Puff Hoody

The best warmth for weight of any other Patagonia jacket, the Micro Puff Hoody delivers ultralightweight, water-resistant, down-like warmth with PlumaFill synthetic insulation.

Synthetic filled clothing fulfills a similar role to down filled clothing, that is as an insulator.

Even in the coldest conditions, your body produces heat, and you feel cold because this heat is removed quickly in a cold environment. The job of insulation layers is to trap air next to the body, allowing your body to warm up this air and then stop losing heat to the environment.

How well the item of cloting does its job depends on a few things; how much air it can trap, how windproof it is (i.e. how much it can stop the trapped air being stripped away by the wind) and how well it does this job if it gets wet.

Synthetic insulation emulates down in that it is made from a tangle of tiny fibres, which trap air and keep warmth in. It is not as good at insulating as down - you will need more synthetic insulation to give the same warmth, but it is getting close! The outer of a synthetic jacket will usually be made of Pertex - a wind resistant, breathable material which stops the warm air in the fibres from being replaced by cold air in a breeze.

Where Synthetic insulation has a big advantage over down is that it doesn't absorb water very well and is quite strong. This means it drys quicky, and doesn't clump together when it becomes wet, unlike down which loses its insulative properties when wet (if the down has clumped, there is nowhere for air to be trapped). For the UK, or anywhere where you are likely to encounter cold, wet conditions, this property of synthetic insulation makes it much more appropriate than down.

If you are heading to altitude and conditions are likely to become so cold that all water is frozen, a synthetic jacket is likely to be too bulky to be practical if it is warm enough and down is a much better choice.

Up and Under OUTDOOR BLOG

Up Hill Down Dale - Beacons Ultra

Up and Under will be helping support at the Up Hill Down Dale Beacons Ultra November 2019 so we thought that we'd put a recommended kit list together from our range with a little help from event sponsors Ultimate Direction and Injinji.
More on Up Hill Down Dale - Beacons Ultra »

Shell Yeah! Patagonia Makes Recycled Shell Jackets!

With such unpredictable, wet and windy weather, waterproof jackets are a must in this country. We all have one… and maybe some of you even have two. But do you know what it's made of?
More on Shell Yeah! Patagonia Makes Recycled Shell Jackets! »

Environmental Responsibility

As an outdoor retailer we're aware that our business relies on the manufacturing, transportation and consumption of gear and related products. In an attempt to reduce our environmental impact, we're making a concious effort to implement sustainable change throughout the business. See what our store is doing and what some of the brands we carry are doing to make a difference.
More on Environmental Responsibility »

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