Start layering your littles with the kids' warm, breathable REI Co-op Lightweight Crew Long Underwear top. It features a made-to-move design and all of the comfy for a day of play.

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Layer your little one with the REI Co-op lightweight long underwear bottoms for infants and toddlers. Designed for warmth, these bottoms are easy to pull on and absorb moisture as it comes.

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Layer your hiking pal with the REI Co-op lightweight long underwear bottoms for kids. Designed for warmth, these bottoms are easy to pull on and wick moisture for comfort.

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The REI Co-op lightweight stuff sack provides a convenient way to protect your sleeping bag from moisture and abrasion. It can also be used to store and organize other gear.

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Like base layers for your hands, these breathable, stretchy REI Co-op liner gloves are designed to fit comfortably under other gloves or as a standalone when the weather starts to turn.

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Stay hydrated, carry all the gear you need for a long singletrack day—and preserve your balance with help from the lumbar reservoir carry system of the 10 L REI Co-op Link hydration pack.

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For those half-day climbing up, half-day screaming down rides, carry the gear and water you need—and stay balanced with help from the lumbar reservoir of the REI Co-op Link 15 L hydration pack.

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Offering a bit of extra warmth for fall rides, the men's REI Co-op Link knickers also protect your legs from scraggly branches and yucca growing out into the trail.

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Sometimes you're riding like the wind, but also riding right into it. When that happens, unpack the protection of the breathable, stretchy, wind- and water-resistant men's REI Co-op Link wind vest.

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Sometimes you're riding like the wind and sometimes you're riding right into it. When that happens, unpack the breathable, stretchy, wind- and water-resistant women's REI Co-op Link wind vest.

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They may look too polite for backcountry, but feed them a little trail dust and the women's REI Co-op link double bike shorts turn into singletrack beasts—that still fit in at the lounge, post-ride.

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Bikepacking or touring, keep your center of gravity low and your ride stable by loading the hefty stuff like food and a stove in the fully waterproof REI Co-op Link Frame bag.

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When you round a bend and see Sasquatch on the trail ahead, you want your camera stat. Keep the stuff you need quickly in the REI Co-op Link handlebar bag and you won't have to dig through a pannier.

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This is the way to roll to your local campground—or pedal for the horizon. The REI Co-op Link Handlebar Roll keeps light, bulky items like clothes, a sleeping bag or bivy dry and stable on the bike.

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