Sort by

Synthetic Filled Clothing Products

£222.83 (inc Vat)
You save 10%
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.

£200.70 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing Proton AR Hoody Men's Arc'teryx
Proton AR Hoody Men's

All Round, warm air-permeable soft-shell insulation that self-regulates to prevent overheating, ideal for rock, ice and alpine climbing.

£200.70 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing Proton AR Hoody Women's Arc'teryx
Proton AR Hoody Women's

All Round, warm air-permeable soft-shell insulation that self-regulates to prevent overheating, ideal for rock, ice and alpine climbing.

£171.82 (inc Vat)
You save 9%
Outdoor Clothing Synthetic-Filled-Clothing W's Nano-Air Hoody Patagonia
W's Nano-Air Hoody

Women's air-permeable synthetic insulation hoody with stretch and comfort as well as versatile functionality at its core.

£161.82 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing Novus Hoody Marmot
Novus Hoody

Breathable synthetic filled jacket which provides insulation, wind resistance, water-repellancy, snow-shedding and breathability in one package.

£160.48 (inc Vat)
You save 10%
Outdoor Running Running-Clothing Running-Insulation M's Nano-Air Light Hybrid Hoody Patagonia
M's Nano-Air Light Hybrid Hoody

The Patagonia M's Nano-Air Light Hybrid Jacket takes features from the one of Patagonia's iconic pieces - the Nano-Air and its FullRange Insulation - and combines them with a wicking waffle knit for breathable...

£151.51 (inc Vat)
You save 10%
Outdoor Clothing Synthetic-Filled-Clothing M's Nano Puff Jacket Patagonia
M's Nano Puff Jacket

A stylish wind resistant PrimaLoft® Gold Eco Insulation jacket. Ideal down the pub, around town and even on the odd mountain adventure. Smart, warm and 'Patagoina-esk' in it's fashionable style.

Special Offer £149.99 (inc Vat)
You save 21%
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

£142.91 (inc Vat)
You save 10%
Outdoor Running Running-Clothing Running-Insulation M's Nano-Air Light Hybrid Jacket Patagonia
M's Nano-Air Light Hybrid Jacket

Active insulation that will keep some wind and moisture off yet breathes well, weighs little and packs small. Designed for constantly on the go active athletes and for cool-weather fast and light missions.

£142.64 (inc Vat)
You save 10%
Outdoor Running Running-Clothing Running-Insulation W's Nano-Air Light Hybrid Jacket Patagonia
W's Nano-Air Light Hybrid Jacket

The Patagonia W's Nano-Air Light Hybrid Jacket takes features from the one of Patagonia's iconic pieces - the Nano-Air and its FullRange Insulation - and combines them with a wicking waffle knit for breathable...

£134.87 (inc Vat)
You save 12%
Outdoor Clothing Synthetic-Filled-Clothing Photon Pants Rab
Photon Pants

The Rab Photon Pant is a synthetic insulated trouser or a great pair of Primaloft Pants. Ideal cold weather clothing for use on Winter Alpine or 6000m mountaineering trips or for emergency use when mountain wal...

£133.50 (inc Vat)
You save 11%
Outdoor Clothing Synthetic-Filled-Clothing Solus Featherless Jacket Marmot
Solus Featherless Jacket

Feels like down...but it's not!!! This genius jacket is an environmentally friendly, synthetic down jacket. It feels and compresses like down...Got to see it to believe it!

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

Raidlight Sample Sale

Sales samples from Raidlight with 50% off RRP (includes SS18 product) and standard Raidlight sale stock with 35% off RRP. Treat yourself or a friend to some superbly priced trail running and ultra running products.
More on Raidlight Sample Sale »

Trip Report - Ice Climbing in Rjukan

Team Up and Under member Ed Jenkins spent a week in Norway at the end of January, on his first adventure with Norwegian Ice. Read about his trip here.
More on Trip Report - Ice Climbing in Rjukan »

Patagonia Micro Puff Hoody Review

Review of the Patagonia Micro Puff hoody, the game-changing insulation piece for 2018. This is the lightest, most packable insulated jacket Patagonia has ever made and it's not got a single gram of down in it!
More on Patagonia Micro Puff Hoody Review »

Please wait!