Built to provide a featherlight pack weight and high-performance warmth, the Hyperion 20F/-6C is among the lightest in its class without sacrificing an ounce of performance. The bag uses thermally-efficient box baffled construction in key areas to ensure warmth and comfort in an ultralight package. Designed with high-quality materials and Therm-a-Rest performance features, the Hyperion keeps your pack light, giving you the freedom to move quickly in the backcountry.
| Regular | Long | |
| Width | 28.5 in | 29 in |
| Length | 80 in | 85 in |
| Girth, Shoulder | 57 in | 58 in |
| Girth, Hip | 49.5 in | 51 in |
| Girth, Foot box | 43 in | 46 in |
| Packed dimension | 6 x 8 in | 6 x 8 in |