Item # STSAI201M

Sea to Summit Ether Light XR Insulated Inflatable Sleeping Pad

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Sea to Summit Ether Light XR Insulated Inflatable Sleeping Pad Review

By Dave

Enwild Gear Specialist

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Designed to allow you to venture outside in 3 seasons and beyond, the inflatable Sea to Summit Ether Light XR insulated sleeping pad has a 4.1 R-Value, a 3.9" thick sleeping base, and a lightweight, packable design. An included pump sack makes inflation fast and easy.

Description

Innovative architecture balances weight and supportiveness: The pad's unique Air Sprung Cells are interconnected pocked chambers formed by a strong dot-welded pattern. This lightweight design creates a sleeping base that is more stabilizing and better conforms to your sleeping body than traditional inflatable vertical or horizontal baffles. This also makes the pad comfortable regardless of your sleeping position.
Thermally-efficient insulation boosts warmth: Thermal Core insulation uses a layer of TRM material to reflect body warmth back your direction and the die-cut layer reduces internal air movement. This design also keeps weight and packed size to a minimum while achieving an ASTM-tested R-Value of 4.1.
Built-in features to simplify inflation and deflation: The XPRESS valve has a one-way inflation port, a deflation port for rapidly dumping air when it's time to pack up, and a fine-tune button for adjusting the pad's firmness. The valve connects to the nozzle of the included Airstream pump sack to allow for highly-efficient, low effort, moisture-free inflation.

Sizing and storage

The Ether Light XR Insulated sleeping pad is available in three tapered sizes: Small (66" x 21.7"), Regular (72" x 21.7"), and Large (78" x 25.2"). It is also available in non-tapered Regular Wide Rectangular (72" x 25.2") and Large Rectangular (78" x 25.2") size options. The Airstream pump sack doubles as a stuff sack for the pad. Also included are a small repair kit and PillowLock patches that enable you to snap a Sea to Summit pillow (sold separately) directly to the pad.

Technical Specs

Best Use

Camping, Backpacking

R Value

4.1

Item Weight

Small: 15.7 oz (17.6 oz with stuff/pump sack)
Regular: 16.6 oz (18.5 oz with stuff/pump sack)
Large: 21.3 oz (23.5 oz with stuff/pump sack)
Regular Wide Rectangular: 21.3 oz (23.5 oz with stuff/pump sack)
Large Rectangular: 23.5 oz (25.6 oz with stuff/pump sack)

Item Dimensions

Small: 66" x 21.7" x 3.9"
Regular: 72" x 21.7" x 3.9"
Large: 78" x 25.2" x 3.9"
Regular Wide Rectangular: 72" x 25.2" x 3.9"
Large Rectangular: 78" x 25.2" x 3.9"

Other

Pump sack that doubles as a stuff sack, small repair kit and PillowLock patches included

Warranty

Limited Lifetome

Type

Inflatable Sleeping Pad

Packed Size

Small: 8.1" x 4.3" x 4.3"
Regular: 8.1" x 4.3" x 4.3"
Large: 9.4" x 4.5" x 4.5"
Regular Wide Rectangular: 9.4" x 4.7" x 4.7"
Large Rectangular: 9.3" x 4.7" x 4.7"

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2 Reviews

5 / 5

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Paul

02/04/26

Super comfortable sleeping pad

Likes

The taper on their Large Mummy Size is very subtle; plenty of room at the foot end. Plenty of thickness for side sleeping. Also, it's smart how they built the pump sack into the stuff sack.

Dislikes

The material is not very flexible and doesn't stretch much, so it is a tad rigid.

Nick

07/22/25

Ether Light XR - Large (Rectangle)

Likes

Seems to be more comfortable at a small weight penalty over the new Nemo Tensor I have. I'll take a little extra weight for better sleep while backpacking!