Clothing · Subcategory
Ultralight Insulation
The 345 insulation we track, from 18 brands — sorted so the best-rated, lightest options rise to the top. Compare spec weights and prices side by side.
High Tail Designs · Insulation
Stick-On Fuzzy Fleece Chalk Liner
0.3 oz$9
Zpacks · Insulation
Zpacks Octa Fleece Mittens
0.6 oz$30
Zpacks · Insulation
Bargain Zpacks Octa Fleece Hat - Purple
0.6 oz$18
Zpacks · Insulation
Bargain Zpacks Octa Fleece Hat - Black
0.6 oz$18
Zpacks · Insulation
Zpacks Octa Fleece Hat
0.6 oz$30
Zpacks · Insulation
Zpacks Octa Fleece Hat
0.6 oz$30
Zpacks · Insulation
Zpacks Octa Fleece Neck Gaiter
0.7 oz$30
Zpacks · Insulation
Bargain Fleece Hat
1.0 oz$15
Zpacks · Insulation
Zpacks Micro-Fleece Hat
1.0 oz$25
Lightheart Gear · Insulation
Neck Gaiter
1.2 oz$15
Outdoor Vitals · Insulation
Vario Jacket - Women's
1.4 oz$200
Outdoor Vitals · Insulation
Vario Jacket - Men's
1.4 oz$210
Zpacks · Insulation
Zpacks Ventum Wind Shell Jacket
2.0 oz$120
Zpacks · Insulation
Zpacks Ventum Wind Shell Jacket
2.0 oz$120
Lightheart Gear · Insulation
Fleece Beanie - Ear Muffs
2.0 oz$20
Feathered Friends · Insulation
Eos Women's Down Vest
2.1 oz$289
Hilltop Packs · Insulation
Women's "Dark Summit" Puffy Jacket
2.1 oz$129
Hilltop Packs · Insulation
Men's "Dark Summit" Puffy Jacket
2.1 oz$129
Feathered Friends · Insulation
Eos Men's Down Vest - Closeout
2.2 oz$161
Feathered Friends · Insulation
Eos Men's Down Vest
2.2 oz$289
Garage Grown Gear · Insulation
Alpha Vest by Yamatomichi
2.7 oz$80
Senchi Designs · Insulation
A60 Crewneck
2.8 oz$90
Feathered Friends · Insulation
Ralle Insulated Jacket Men's
2.8 oz$390
Gossamer Gear · Insulation
Pack Jacket
2.9 oz$55
Senchi Designs · Insulation
TurboSheep™ 60 Hoodie
3.1 oz$120
Feathered Friends · Insulation
Beta Insulated Jacket Men's
3.2 oz$450
Garage Grown Gear · Insulation
Men's Tarn Down Jacket by Katabatic Gear
3.3 oz$279
Zpacks · Insulation
Zpacks Octa Fleece Thermal Bottoms
3.5 oz$100
Zpacks · Insulation
Zpacks Octa Fleece Thermal Bottoms
3.5 oz$100
Senchi Designs · Insulation
Mori 80 Legging
3.5 oz$125
Feathered Friends · Insulation
Beta Insulated Jacket Women's
3.6 oz$450
Feathered Friends · Insulation
Eos Women's Down Jacket
3.7 oz$429
Kifaru International · Insulation
Wind River Jacket
3.8 oz$90
Senchi Designs · Insulation
TurboSheep™ 90 Half-Zip Hoodie
3.9 oz$130
Senchi Designs · Insulation
A120 Half-Zip Pocket Hoodie
3.9 oz$135
Senchi Designs · Insulation
A120 Half-Zip Hoodie
3.9 oz$120
Senchi Designs · Insulation
A90 Half-Zip Hoodie
3.9 oz$115
Feathered Friends · Insulation
Eos Men's Down Jacket - Closeout
4.0 oz$245
Garage Grown Gear · Insulation
Women's Fastpacker Alpha 90 Fleece by Alpine Fit
4.0 oz$119
Feathered Friends · Insulation
Eos Men's Down Jacket
4.0 oz$429
Outdoor Vitals · Insulation
(USED) Highline Thermal Leggings
4.0 oz$68
Outdoor Vitals · Insulation
Highline Thermal Leggings
4.0 oz$80
Zpacks · Insulation
Women's Octa Fleece Hoody - Pullover
4.0 oz$119
Feathered Friends · Insulation
Phantom Waterproof Jacket Men's
4.1 oz$225
Zpacks · Insulation
Goose Down Vest
4.2 oz$199
Feathered Friends · Insulation
Squamish Jacket Women's
4.2 oz$180
Zpacks · Insulation
Women's Octa Fleece Hoody - Full Zip
4.2 oz$119
Feathered Friends · Insulation
Helios Down Vest
4.3 oz$349
Garage Grown Gear · Insulation
Women's Windshifter Wind Shell Jacket by Ridge Merino
4.4 oz$150
Zpacks · Insulation
Clearance - Goose Down Vest - Burnt Orange - Large
4.6 oz$179
Garage Grown Gear · Insulation
Women's Half Zip AIR 70 Pullover by SkyGOAT
4.6 oz$129
Zpacks · Insulation
Zpacks Octa Fleece Hoody - Pullover
4.7 oz$119
Garage Grown Gear · Insulation
Women's Deploy Down Hoody by Black Diamond
4.9 oz$499
Outdoor Vitals · Insulation
OV Fleece-Lined Beanie
5.0 oz$34
Garage Grown Gear · Insulation
Men's Windshifter Wind Shell Jacket by Ridge Merino
5.0 oz$150
Zpacks · Insulation
Bargain - Clearance - Goose Down Vest - Burnt Orange - Extra Large
5.0 oz$179
Zpacks · Insulation
Clearance - Goose Down Vest - Jet Black - Extra Large
5.0 oz$179
Zpacks · Insulation
Zpacks Octa Fleece Hoody - Full Zip
5.1 oz$119
Feathered Friends · Insulation
Squamish Jacket Men's
5.1 oz$126
Zpacks · Insulation
Zpacks Octa Fleece Camp Pants
5.2 oz$100
Building a kit?
Add any of these to your pack and track base weight, total weight, and cost as you go.