Thermarest LITE SEAT Heatwave Seat

The Thermarest LITE SEAT Heatwave is a lightweight, packable seat cushion for fast-and-light travel and day use. It adds insulation and comfort when sitting on cold or hard surfaces while keeping overall pack weight low.

Key benefits

• Self-inflating design – adjust firmness by inflating or deflating.
• 3.8 cm foam – die‑cut urethane foam provides cushioning and thermal insulation.
• Inflated dimensions 33 × 41 × 3.8 cm – ample seating area for comfort.
• Packable and secure – integrated bungee holds the seat rolled tight for easy carry.
• Lightweight – about 0.11 kg, suited to minimalist packs.

Typical use: a lightweight seat for short breaks on hikes, camping and day activities in spring to autumn conditions where you want to reduce contact with cold or damp ground without adding bulk to your pack.