— Active insulation for comfortable temperature control
Teton Bros.'s "RUN WITH OCTA" is an active insulation jacket that can maintain a comfortable body temperature even in environments with large temperature differences. The unique "Stretch Octa Bonding" material is strategically mapped and placed to achieve excellent breathability, moderate heat retention, and lightness at the same time. It is a versatile layer that can be used in a variety of situations, from mountain climbing and traverses where you tend to sweat, to activities on snow.
Features and Functions
■ Stretch Octa Bonding Mapping
The "Octa" knit, which is both warm and breathable, is integrated with the Primeflex 20D outer fabric. By placing it on the front body, shoulders, and upper arms, the areas that tend to get cold are kept warm, while the back is made of a single piece of fabric to ensure breathability. This prevents overheating while on the move.
■ Double slider front
The new front zipper has a double slider that can be opened from the top or bottom. It is also convenient when using a harness or to regulate body temperature, making it more convenient to move around.
■ Large capacity front pocket
The zipper pocket that stretches from the chest to the abdomen has a mesh structure on the inside and also has ventilation functions. It is a practical design that takes into consideration ease of use while on the move.
■ Thumb anchor on the cuff
The cuffs have thumb anchors for a secure fit around the wrist, and the quick-drying, stretchy material keeps out the elements and won't interfere with layering.
■ Hem adjuster and packable design
The adjuster cord on the right hem can be fixed inside the hem so it won't get in the way when you're on the move. In addition, it is packable so you can store the main body in the right chest pocket, making it easy to carry.
■ Comfortable material composition
The outer material is made of 20D Primeflex, which has excellent stretch and durability, while the lining is Octa knit, which has a good balance of quick-drying, breathability, and light weight.
Specification
Model number | TB251-18M |
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color | Navy / Gray |
size | S / M / L / XL |
material | Primeflex / Stretch Octa Bonding |
weight | 240g (medium size) |
Stretch Octa Bonding Mapping
Mapping structure that provides both warmth and ventilation. Placed on the front, shoulders and upper arms for dynamic warmth.

Front zipper / ventilation
The diagonally positioned angle zipper has a double slider, which also provides ventilation.

Front pocket
The zipper pocket that extends from the chest to the abdomen has a mesh interior and also functions as a bench.

Hem adjuster
One-sided adjuster. Drawstring can be handled on the inside, so ease of movement is not impeded.

Packable
It is packable and can be stored in the right chest pocket, making it convenient to take when traveling or to races.

Recommended in these situations
- High-intensity activities such as mountain climbing, traverses, and mountain running
- A fast-changing environment where activity and stagnation alternate
- A lightweight, warm outerwear piece designed for year-round wear
[About stock]
Since we share inventory between our stores and our online store, it may happen that an item is out of stock after you place your order. In that case, we will contact you as soon as possible. Thank you for your understanding.