We've compared over 200 base layers and selected the best ones for each season and purpose, and how to choose the perfect one for you.
Patagonia , Mountain Hardwear , NORRONA , Rab , comparison , THE NORTH FACE , mountaineering guide , to choose , recommendations , CAYL , base layers , HERENESS , ibex
Written by Yasushi Hisatomi
![[OGZ's Yamamachi Exploration Vol. 22] Yamanashi Shioyama Edition: The trendy fragrance of the moment! And the morning market Cirque 3, 5, and 6 garages are packed full! [Event 3, 5, and 6 Shioyama Vol. 2 information also available]](https://outdoorgearzine.com/wp-content/uploads/1600850_catch.jpg "[OGZ's Yamamachi Exploration Vol. 22] Yamanashi Shioyama Edition: The trendy fragrance of the moment! And the morning market Cirque 3, 5, and 6 garages are packed full! [Event 3, 5, and 6 Shioyama Vol. 2 information also available]")
![[December Offline Event] Support your winter mountain debut! First-time snow mountain hike and gear experience](https://outdoorgearzine.com/wp-content/uploads/yukiyama2025-26.jpg "[December Offline Event] Support your winter mountain debut! First-time snow mountain hike and gear experience")
![Trails, rocky terrain, hiking, and trekking—the Caravan Grand King GK-ALT mountain boots fill a new sweet spot for hiking boots, allowing you to explore Japan's mountains with just one pair. [Quick Review]](https://outdoorgearzine.com/wp-content/uploads/DSC04000_catch.jpg "Trails, rocky terrain, hiking, and trekking—the Caravan Grand King GK-ALT mountain boots fill a new sweet spot for hiking boots, allowing you to explore Japan's mountains with just one pair. [Quick Review]")
![[A genuine, self-funded review] Can you enjoy Japan's mountains all year round with just this one backpack? The PAAGOWORKS ZENN 35 pioneers a new form of "modular backpack" [Hands-on review]](https://outdoorgearzine.com/wp-content/uploads/DSC08788-2.jpg "[A genuine, self-funded review] Can you enjoy Japan's mountains all year round with just this one backpack? The PAAGOWORKS ZENN 35 pioneers a new form of "modular backpack" [Hands-on review]")
![Going beyond "lightweight"—"Lightweight and spacious, but not just that"—Big Agnes' Copper Spool UL1 tent, with masterful details, sets a new standard for comfort [Practical Review]](https://outdoorgearzine.com/wp-content/uploads/DSC04405.jpg "Going beyond "lightweight"—"Lightweight and spacious, but not just that"—Big Agnes' Copper Spool UL1 tent, with masterful details, sets a new standard for comfort [Practical Review]")
![[Let's go mountaineering!] The 3rd ALPS OUTDOOR SUMMIT '25! [Event Report]](https://outdoorgearzine.com/wp-content/uploads/1600316.jpg "[Let's go mountaineering!] The 3rd ALPS OUTDOOR SUMMIT '25! [Event Report]")
![[A self-funded review] The perfect balance of lightness and strength! A hands-on review of the freestanding single-wall shelter "Promont UL-10 3S" that I ended up using after my tent collapsed in Yariho.](https://outdoorgearzine.com/wp-content/uploads/IMG_20251009_224202_catch.jpg "[A self-funded review] The perfect balance of lightness and strength! A hands-on review of the freestanding single-wall shelter "Promont UL-10 3S" that I ended up using after my tent collapsed in Yariho.")
![[Lightweight? Wind-powered? Quiet?] A small electric pump for air mattresses is interesting](https://outdoorgearzine.com/wp-content/uploads/DSC04577.jpg "[Lightweight? Wind-powered? Quiet?] A small electric pump for air mattresses is interesting")
![John Muir Trail Northbound Traverse (2025 NOBO) Record [Chapter 4] Onion Valley to Woods Creek](https://outdoorgearzine.com/wp-content/uploads/JMT_catch_04.jpg "John Muir Trail Northbound Traverse (2025 NOBO) Record [Chapter 4] Onion Valley to Woods Creek")
