Pre-order the new 2026 Hyperlite Mountain Gear PEMI 15 Trail Running Pack (Ships when produced)

Pre-orders require 2-3 months for production!

"When moving for long periods in the mountains, fluidity equals efficiency, equals speed." —Will P.

Lightweight design: weighs only 12.8 oz (approx. 363 g)
Precisely fitted to chest circumference

Chest circumference reference:
S size: 34-38 inches
M size: 38-41 inches
L size: 41-43 inches
XL size: 43-46 inches

Product Introduction

The PEMI 15 redefines the standard for high-performance trail running packs. This low-volume hybrid running vest perfectly combines lightweight design with durability, and features revolutionary ALUULA 97 material and thermal welding technology, elevating waterproof performance to a new level. It is designed for long-distance challenges that demand extreme freedom of movement and easy access to gear. Whether you're tackling ultra-marathons requiring ample hydration, traversing technical terrain with an ice axe, or simply seeking a high-performance, low-volume vest that can handle all weather conditions, the PEMI 15 is your key partner for reaching the podium—whether the finish line is met with cheering crowds or the silent mountains.

Core Advantages

· Stable Fit System: Fully fitted vest design keeps the center of gravity close to the body, effectively reducing pack bounce. Paired with highly breathable mesh for ultimate comfort.
· Premium Material ALUULA 97: Core made of Ultra-High Molecular Weight Polyethylene (UHMWPE), striking a perfect balance between durability, lightweight design, waterproofing, and advanced welding technology.
· Molded Back Panel: Made with welded foam, it conforms to the curve of the back, providing stable and comfortable support for long treks or for extra gear needed in extreme conditions.

Detailed Features

· Material Craftsmanship: Features ALUULA 97 (with UHMWPE core), combining lightness, strength, waterproofing, and cutting-edge welding technology.
· 15L Practical Capacity: Sufficient to hold spare clothing and extra gear for multi-day trips.
· Shoulder Strap System: Fully integrated vest design stabilizes the center of gravity and reduces bouncing. Highly breathable air mesh significantly enhances comfort during extended wear.
· Breathable Back Panel: Welded foam back panel conforms to the body, providing excellent support for carrying loads during long treks or in harsh weather.
· Hydration System: Hydration bladder compatible, with a pre-designed hose port that easily routes through the pack, improving running efficiency. The hydration bladder compartment is separate from the main compartment to keep the interior dry.
· External Storage: Abundant pockets: 2 soft flask pockets, 2 large front pockets, 2 zippered pockets, 2 side pockets, plus adjustable chest straps. The right soft flask pocket also integrates a lightweight emergency whistle for easy access to safety.
· External Expansion: Front features a durable UHMWPE elastic mesh pocket for quick storage of wet clothing; paired with full-length webbing loops, offering endless possibilities for external gear attachment.
· Quick Access: #5 YKK two-way side zippers allow you to retrieve items from the pack in seconds.
· Roll-Top Closure: Paired with vertical compression straps, it allows you to adjust the pack's volume based on contents, ensuring a stable and compact load while enhancing protection.
· Top Compression Strap: Detachable top strap connects to welded UHMWPE webbing loops, providing additional compression or storage options.
· Side System: Two sets of detachable cord loops for stowing trekking poles at the bottom of the pack while on the move. Vertical pole/axe compression straps also efficiently secure an ice axe.

Detailed Specifications

· Materials: ALUULA 97, breathable air mesh, UHMWPE elastic mesh, Lycra elastic mesh
· Capacity: 15 liters
· Back panel width: 8.25 inches / 21 cm
· Pack height: 23 inches / 58.4 cm
· Top circumference: 23.75 inches / 60.3 cm
· Bottom circumference: 19 inches / 48.3 cm
· Origin: Mexico