For traditional comfort with a modern design approach - the Trek Tk3 from Sea to Summit is the ultimate sleeping solution.

The warmest bag in the Sea to Summit Trek range of sleeping bags, the Trek Tk3 has a tapered rectangular shape which is a bit roomier than a mummy style bag. The shell is made from a light and compressible durable 30D nylon, with a soft touch breathable 20D nylon lining. For insulation, this bag is filled with RDS 650+ Loft ULTRA-DRY Down which provides warmth and is also easy to compress.

The oversized zipper draft tube has anti-snag materials to prevent catches, while the vertical chest baffles help prevent cold spots and down migration. The full-length two-way side zip and separate foot zip mean you can use it as a quilt for balmier nights or have your feet poking out if you need some ventilation. The neck collar draft tube seals in warmth, and you can draw in the 3D draw hood to keep you snug while you sleep.

You can also keep any valuables close to hand in the large internal security pocket while you snooze. The comfortable shape, excellent insulation and versatile features are what make the Trek Tk3 a classic sleeping bag for all kinds of adventures.

• -6°C comfort rating, -12°C lower limit
• Additional neck collar draft tube to seal and trap warmth
• 20D soft touch light and breathable lining
• RDS certified 650+ Loft ULTRA-DRY Down for insulation and compressibility
• 3D hood draws in tight when needed
• Lightweight fabrics for reduced weight and bulk
• Vertical chest baffles prevent down migration and cold spots
• Two-way side and separate foot zip allow for use as a quilt
• Large internal security pocket
• Includes storage cell and compression bag
• LH and RH bags zip together