Momentum Pants / Momentum Pants

[Manager's Comments]

The first thing that will surprise you when you put them on is how thin and light they are. They're also smooth and stretchy, so they're incredibly comfortable to wear. Yes, they are incredibly comfortable. The fabric is thin, so it might be cold in mid-winter, but I think they are the perfect choice for summer long pants! I highly recommend these pants!!

[2026 Spring/Summer Update Details] (Beluga and Oak colors)

・Perforated mesh has been added to areas where heat tends to accumulate, such as the lower back and behind the knees, to improve breathability.

・A zippered security pocket has been added to the right hip, making it easier to store smartphones, coin cases, and other items.

・The waist bungee has been changed to a flat drawstring, making it easier to adjust.

[Sizing]

Rab uses UK sizing, and these pants are a regular fit.

For a manager who is 170cm and 68kg, the "UK S (JPN M)" size is a perfect fit.

However, due to a protruding stomach, the waist felt tight, so sizing up to "UK M" was just right.

If I could lose a little more weight, UK S might be better...

[Manufacturer's Description]

Move quickly and cover more distance with less bulk in the Momentum Pants. These multi-activity pants feature a tapered design that eliminates excess material, making them ultralight, slim-fitting, and highly breathable—ideal for staying cool on hot days in the mountains.

Crafted from lightweight, stretchy Matrix™ fabric, they ensure complete freedom and range of motion for your legs, while wicking away moisture to keep you dry and comfortable. With a minimalist, pull-on design that minimizes weight and bulk, they are an essential item for your thru-hiking gear list.

[Features]

• Matrix™ fabric offers incredible stretch and flexibility, allowing for unrestricted movement in challenging terrain.

• Minimalist elastic waistband with drawstring adjustment for a comfortable fit.

• Laser-cut vents on the lower back, behind the knees, and in hand pockets efficiently dissipate heat.

• Two open hand pockets and a zippered security pocket to store essentials.

• Excellent knee articulation and a gusseted crotch structure ensure unhindered movement.

• Tapered cut minimizes excess bulk around the ankles.

[Material]

Uses Rab's proprietary Matrix fabric. Matrix™ fabrics, designed for durability and comfort, offer excellent wind resistance and breathability. They are also quick-drying and provide high levels of UPF protection.

[Specs]

Fit: Regular

Weight: 242g (M size)