Down is still the material with the best heat retention in relation to weight. A down sleeping bag is lighter and takes up less room in your pack.

Marmot Womens Angel Fire RRP £220.00 save 10 % instore or online. Price: £198.00

Marmot Men's Sawtooth RRP £220.00 save 10 % instore or online. Price: £198.00

Marmot Mens Hydrogen RRP £330.00 save 10 % instore or online. Price: £297.00

Haglofs Goga 2s RRP £250 Save 10% instore and online Price: £225.00

Marmot Mens Helium Membrain RRP £350.00 save 10 % instore or online. Price: £315.00