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Ether Light XR Insulated + Sea To Summit

Ether Light XR Insulated

Insulating and comfortable mattress - Ether Light XR Insulated - Sea to Summit - 2026

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Ether Light XR Insulated
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Description

TheEther Light XR Insulated is an inflatable mattress from the brand Sea to Summit, ideal for Bivouac and designed for use in three seasons thanks to its R-Value 4.1 rating.

This mattress stands out for its innovative construction Delta Core™ , which optimizes heat retention where needed while reducing the overall weight by approximately 20%. With a thicknessof 10 cm, it offers exceptional comfort and good insulation against the cold ground. Its upper surface in 30D stretch fabric provides a soft and pleasant feel, while the underside in 75D polyester with TPU lamination guarantees excellent strength and durability.

It also Ether Light XR Insulated incorporates the system Pillow Lock™ to which you can attach a pillow Aeros™ for perfect support throughout the night. Its multi-function valve makes inflation and deflation easy, and the included Airstream bag also serves as an inflation bag for effortless inflation. Ergonomic and optimized, this mattress is an ultra-lightweight and compact companion for your outdoor adventures all year round.

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The Ether Light XR Insulated is a thick, insulating mattress from the brand Sea To Summit.

It features Air Core-V optimised foam construction, which optimises weight distribution and insulation to make it lightweight, insulating and comfortable. With an R-Value of 4.5, this mattress can be used all year round. Its insulation Thermal Core makes this a mattress that will keep you warm, while reducing the weight of the model.

This model comes with a storage bag that includes a built-in pump Airstream. A repair kit and replacement valve are also included.

Ether Light XR Insulated
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Technical details
R-value
4.1000, 4.5
Best of Snowleader
Mattress shape
Ergonomic
Overview
Brand
Sea To SummitSea To Summit-logo
Warranty
2
Year
2026
Season
Spring
Gender
Unisex
Product details
Dimensions (cm)
183 x 55 cm
Thickness (cm)
10
Weight (g)
605 470
Technical details
Compactible
Yes
Insulation
Yes
Self-inflating
No
Air mattress
Yes
Ultracompressible
Yes
Other features

- technology Delta Core™
- Attachment system Pillow Lock™
- Very thick
- Multifunction valve
- Soft and comfortable
- Sturdy
- Storage bags/inflation bags included

Composition :
- Upper material: 30D stretch fabric
- Outer material: 75D Polyester, laminated TPU
- Insulation : Thermal Core




Sizes:

Size Small Regular Large
Dimensions 168 x 55 cm 183 x 55 cm 198 x 64 cm
Dimensions when folded Ø 11 x 21 cm Ø 11 x 21 cm Ø 11.5 x 24 cm
weight 445 g 470 g 605 g




Pillow Lock™ This system allows you to attach a pillow Aeros™ to your mattress Sea to Summit to prevent it from slipping.
Delta Core™ This strategic mattress construction increases heat retention in areas where it is needed and reduces the weight of the mattress in areas where less warmth is required, resulting in an overall weight reduction of approximately 20%.
Airstream This clever storage bag can also be used as an inflation bag. It allows you to inflate easily and saves you from the breathlessness and dizziness caused by inflating with your mouth.
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- Delta Core™ technology
- Hanging system Pillow Lock™
- Very thick
- Multifunction valve
- Soft and comfortable
- Robust
- Storage bag/inflator included

Materials:
- Upper material : 30D stretch fabric
- Outer material: 75D polyester, TPU laminate
- Insulation: Thermal Core

Sizes:


Size Small Regular Large
Dimensions: 168 x 55 cm cm 183 x 55 cm 198 x 64 cm
Dimensions folded Ø 11 x 21 cm Ø 11 x 21 cm Ø 11.5 x 24 cm
Weight 445g 470g 605g




Pillow Lock™ This system allows you to attach a Aeros™ pillow to your Sea to Summit mattress to prevent it from slipping.
Delta Core™ This strategic mattress construction increases heat retention in areas where it is needed and reduces the weight of the mattress in areas where less heat is required, for an overall weight reduction of around 20%.
Airstream This clever storage bag can also be used as an inflation bag. It's easy to inflate and saves you the breathlessness and dizziness of inflating by mouth.

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