Inflatable Mattress SEA TO SUMMIT Comfort Plus Insulated ASC L - insulated camp sleeping pad, large

The SEA TO SUMMIT Comfort Plus Insulated ASC L is an inflatable insulated camp sleeping pad designed to provide enhanced comfort and thermal protection for large-size users. Its Comfort Plus internal construction creates a cushioned, contoured surface that reduces pressure points while the insulated ASC layer improves heat retention for cooler nights. The pad packs to a compact size for transport and is intended for use in tents, bivouacs and car camping where a balance of comfort, warmth and light weight is required.

Advantages

The Comfort Plus design offers a stable, ergonomic sleeping area with increased cushioning compared to single-layer pads. The integrated insulated layer adds thermal resistance to help reduce heat loss to the ground, extending usable seasonality. Despite its larger dimensions, the pad compresses into a small packed volume and is made from durable materials suited to outdoor use. The combination of insulation and air chambers provides both comfort and a controlled sleeping height.

Suitable for

• Car camping and basecamp trips where larger sleeping area and comfort are priorities
• Tent or bivouac use on cool to cold nights when insulation from the ground is needed
• Campers who prefer a cushioned, mattress-like sleeping surface rather than a thin pad
• Users who need a large-size sleeping pad for added space and support

When it may not be suitable

The Comfort Plus Insulated ASC L is not optimized for ultralight backpacking where minimum weight and smallest packed size are the primary concerns; its larger size and added insulation increase weight and volume compared with minimalist pads. It may also be excessive for warm-weather use where insulation is unnecessary and a simpler, thinner pad would suffice.

Key specifications

• Type: Inflatable insulated sleeping pad
• Construction: Comfort Plus multi-chamber cushioning with insulated layer
• Size profile: Large (designed for larger users)
• Intended use: Tent, bivouac, car camping
• Packed volume: Compresses to compact size for transport
• Surface: Cushioned, contoured sleeping surface for pressure relief
• Thermal properties: Insulated layer to reduce heat loss to ground
• Durability: Outdoor-grade materials suitable for regular campsite use

How to use

Unroll the pad on a clean, flat surface inside your tent or shelter, avoiding sharp objects. Inflate according to the manufacturer’s valve instructions until you reach a comfortable firmness—do not overinflate. For improved thermal performance, allow the insulated core to stabilize before use. When packing, open the valve to release air, roll the pad tightly from the foot end to force air out, then secure it in its storage sack. Regularly inspect the pad for punctures and repair small leaks with the supplied repair kit or appropriate patch material.

What to consider before purchase

• Confirm that the large size is appropriate for your height and sleeping position
• Consider the intended use: insulation and comfort versus weight for backpacking
• Check packed dimensions and weight to ensure it fits your transport needs
• Verify valve type and inflation method match your preference for speed and convenience

Usage recommendations

Use a footprint or groundsheet beneath the pad to protect the underside and extend service life. For colder conditions pair the insulated pad with an appropriate sleeping bag rated for expected temperatures. Follow manufacturer care instructions for cleaning, storage and repairs to maintain insulation performance and material integrity.