Asym Underquilt „ThermaClew“

Climashield® APEX insulation can get bulky, especially in colder-rated quilts, but here’s the solution.
Meet the Asym Clew suspention Underquilt: probably the only asymmetrical hammock underquilt on the European market.

Optimized for the diagonal lay, it saves both weight and volume without sacrificing warmth.
The 5 oz (167 gsm) version weighs only ~520 g and packs down to 4.2 L, about 30% smaller and lighter than a standard underquilt of the same warmth.

Flip it for left or right lay.
Sleep warm, pack light.

Handmade to order: Your quilt will be ready to ship within ~1 week.

Color

Temperature rating

Cold Spot Boost

Išvalyti

Designed around the way you actually sleep in a hammock.

The Asym Underquilt takes the natural diagonal lay of a hammock and uses it to your advantage.
By shaping the quilt to match how you actually sleep, unnecessary fabric and insulation are removed, cutting both bulk and weight without losing warmth where it matters most.

For comparison:
Regular 167 gsm underquilt — 750 g / 6.7 L
Asym underquilt — 520 g / 4.2 L

That’s less to carry, less to pack, and just as cozy through the night.

Features

Climashield® APEX insulation — continuous filament synthetic fill that stays warm even when damp.
20D Nylon fabric — DWR-coated and PFAS-free, lightweight, soft, and weather-resistant.
Clew suspension system — a rare and innovative attachment method that makes setup faster, simpler, and fully adjustable. Fits virtually any gathered-end hammock, and lets you fine-tune the quilt position up to ~50 cm. No extra straps or complicated rigging required.
Reversible design — works for both left or right diagonal lay; just flip the quilt.
Optimized asymmetrical cut — warmth where you need it, nothing extra where you don’t.
Handmade in Lithuania, field-tested in real hammock conditions.
Temperature ratings (estimated based on material, coming soon):

APEX Thickness Comfort Lowest Comfort

100 gsm 12 °C 9 °C

133 gsm 7 °C 5 °C

167 gsm 0 °C −2 °C

200 gsm −3 °C −5 °C

Optional: Cold Spot Boost

Cold air tends to find your backside first — so there’s now an option to fight back.
The Cold Spot Boost variant adds a localized layer of extra insulation in the hip/seat area, giving you more warmth where it’s most needed without adding much bulk.

Perfect for cold sleepers or deep autumn nights.
Add only ~20–30 g of weight — feel the difference all night long.

In short

Less bulk. Less weight.
Same warmth — exactly where you need it.
Clew suspension makes setup effortless.
Made by hand, built for hammock sleepers who know their lay.

Handmade to order: Your quilt will be ready to ship within ~1 week.

asym clew suspension underquilt need for trees climashield apex insulation

Color	Khaki green (Olive), Brown
Temperature rating	APEX 100: Comfort 12 °C / Lowest 9 °C, APEX 133: Comfort 7 °C / Lowest 5 °C, APEX 167: Comfort 0 °C / Lowest −2 °C, APEX 200: Comfort −3 °C / Lowest −5 °C
Cold Spot Boost	With Cold Spot Boost, Without Cold Spot Boost