Arc'teryx Rho LT Men's Base Layer Bottom

The Rho LT Bottom is a lightweight thermal base layer built for low and medium output in cool to cold conditions. Its Torrent™ stretch fleece has a soft brushed surface that moves moisture away from the skin, while elastane fibres add stretch and work with articulated patterning and a gusseted crotch for unrestricted movement.

The next-to-skin fit keeps material close to the body to aid thermal efficiency and moisture transfer, and the antimicrobial treatment helps manage odour. An ankle-length cut, an asymmetrical elastic waistband designed for easy layering, and a hidden-zip thigh pocket for a smartphone round out the design.

Key Features

Highlights

Thermally efficient base layer with excellent moisture management properties. Has stretch comfort.

Materials & care

• Body: Torrent™ - Jersey knit, 185gsm - 84% Polyester, 16% Elastane
• Origin of fabric: TAIWAN, CHINA
• Origin of dyeing: TAIWAN, CHINA
• Origin of Manufacture: VIETNAM
• May release plastic microfibres into the environment when washing
• Machine wash gentle low
• Tumble dry gentle low
• Do not bleach
• Wash dark colours separately
• Do not dry clean
• Do not iron
• Do not use fabric softener
• Double rinse
• Remove immediately
• Wash inside out

Sizing & fit

Fit: Next-to-skin. Streamlined fit. Patterned to keep material as close to the body as is comfortably possible to enhance moisture management, thermal efficiency, and fit comfortably under layers.

Size chart

Size S: Waist Width Relaxed 68.0 cm, Waist Width Extended 95.0 cm, Inseam 73.8 cm
Size M: Waist Width Relaxed 73.0 cm, Waist Width Extended 100.0 cm, Inseam 74.6 cm

How to use

Wear the Rho LT Bottom as a next-to-skin base layer under your outer layers for low and medium output activities in cool to cold conditions. The ankle-length cut and asymmetrical elastic waistband are designed for easy layering.

Shipping & Delivery

Shipping is FREE on every order — no minimum purchase, no promo code needed.

• Processing time: orders ship within 1–3 business days (Monday–Friday, excluding holidays).
• Delivery time: after your order ships, most packages arrive in 2–5 business days.
• Tracking: you'll receive an email with your tracking number as soon as your order leaves our facility in Wenatchee, WA.
• Where we ship: we currently ship to addresses within the United States.
• Large items: TVs and large appliances are packed with extra protection and may require a signature on delivery.

Questions about an order? Email help@chantforge.com with your order number.

30-Day Free Returns

Changed your mind, or the size isn't right? You can return most items within 30 days of delivery, and the return shipping is on us.

1. Email help@chantforge.com with your order number and the item(s) you'd like to return.
2. We'll send you a prepaid return label and instructions.
3. Pack the item in its original condition with all tags, accessories and packaging, and drop it off with the carrier.
4. Once we receive and inspect your return, we'll refund your original payment method — usually within 5–7 business days.

Please note: items must be unworn or unused and in original condition. Footwear should be tried on indoors on a clean surface. LEGO sets must be unopened. If an item arrives damaged or defective, contact us within 48 hours of delivery and we'll make it right.

Read our full Refund Policy.

100% Authenticity Guarantee

Every item sold by Chant Forge is guaranteed to be 100% authentic. We never sell replicas or counterfeits.

• If you ever believe an item you received is not authentic, contact us and we'll issue a full refund, including any shipping costs.
• Products ship in their original manufacturer packaging whenever available.
• Have a question about a specific product? Email help@chantforge.com — we're happy to help.