Sea to Summit Camp Plus SI sleeping mat Rectangular Regular — 1.5in foam, R-value 4.2

Sea to Summit Camp Plus SI is a rugged, 1.5-inch foam sleeping mat that combines thermal insulation, durable recycled fabric, and a reversible valve for comfortable four-season camping sleep.

Engineered for campers, scouts, and lightweight car-camping trips, the Camp Plus SI pairs layered foam construction with Sea to Summit's Air Zone design to deliver warmth and body support without excess bulk. The rectangular shape gives extra sleeping surface for side sleepers or anyone who prefers more room, while a durable 75D recycled polyester face resists abrasion and repeats of rough outdoor use. Packed small and weighing just 2.4 pounds, the pad also includes practical accessories—PillowLock patches, a stuff sack and a field repair kit—so it’s ready for multi-night outings.

How does this mat keep me warm on cold ground?

The Camp Plus SI uses multi-layer foam and Air Zone channels to trap insulating air under the body while maintaining supportive contact points. A tested R-value of 4.2 means it provides reliable insulation for three-season use and many four-season conditions short of extreme alpine winter settings.

• 4.2 R-value for solid thermal performance
• Air Zone foam targets core contact areas to minimize heat loss
• 1.5-inch thickness balances insulation and pack size
• Closed-cell foam construction retains insulation when punctured

What features make it durable and easy to use?

A 75D recycled polyester face resists wear and the pad’s closed-cell foam structure tolerates rough ground better than many air-only mats. The multifunction reversible valve simplifies inflation and deflation, while included repair patches and a stuff sack help maintain the mat during extended trips.

• Durable 75D recycled polyester top for abrasion resistance
• Reversible valve for fast inflation and one-way deflation
• PillowLock adhesive patches to secure a pillow in place
• Field repair kit for trail-side puncture fixes

Will the size and weight fit my trip style?

Measuring 72 x 25.2 x 1.5 inches when open, the rectangular pad offers more sleeping surface than tapered designs, which helps side sleepers and gear layouts inside wider tents. It compresses to 13.4 x 5.9 inches and weighs 2.4 pounds—light enough for car camping and many backpacking scenarios where durability and warmth outweigh ultralight objectives.

• Full length accommodates most adults and side sleepers
• Packs down to a compact 13.4 x 5.9 inches for transport
• 2.4 lb weight balances portability and robust construction
• Rectangle shape maximizes usable sleeping area

How does the valve and design speed setup and packup?

The multi-function reversible valve enables rapid inflation, controlled air fill for desired firmness, and a one-way deflation mode that speeds packing. Air Zone construction minimizes bulk while maintaining supportive zones, cutting setup time compared with multi-component insulated pads.

• Reversible valve: quick inflation and fine pressure adjustment
• One-way deflation option for faster packdown
• Air Zone layout reduces unnecessary foam bulk
• Lightweight stuff sack included for organized storage

Who is this for? The Sea to Summit Camp Plus SI Rectangular/Regular is aimed at campers and backpackers who want dependable warmth, durable fabric, and a roomy sleep surface without the fragility of inflatable-only pads. It’s an excellent choice for scouts, car campers, and multi-season trekkers who value comfort and repairability on the trail.