Drew Thayer

Drew Thayer 1

Drew’s love of gear is born from his life-long obsession with human-powered adventure in the mountains. On foot, on ski, on bike, and on the steep rocks, he loves exploring Colorado’s mountains through each season.
Drew brings a technical eye to gear — he’s a data scientist with a Masters’ degree in Geophysics and loves to understand the design and engineering make great gear what it is. He’s also worked in the field for many years — as a wilderness therapy field guide and a Geophysicist — and knows a thing or two about function and durability of technical equipment.
Drew tests gear in real mountain conditions, on overnight ventures whenever possible. His specialties are rock/alpine climbing and light-and-fast human-powered pursuits on ski or mountain bike. He’s ventured on exploratory climbing expeditions in Argentina, Peru, and Alaska, and completed remote technical river descents in Alaska and Colombia.
When not building statistical models and writing code, he can be found tending his garden or trying to keep up with his awesome wife.
Drew Thayer 2

Articles by Drew Thayer

Drew has contributed 60+ gear reviews to Engearment, with a focus on climbing, alpine, backcountry skiing, trail running, and technical mountain gear. Here are his most recent articles:

Patagonia R1 Air Fleece Crewneck – A Cozy, Breathable Update to a Classic Midlayer

December 10, 2025 — Patagonia’s R1 line has been a staple in Drew’s layering kit for over a decade. The updated crewneck takes the classic waffle fleece and gives it a more relaxed, sweater-like fit — the most versatile and comfortable version yet.

Patagonia Black Hole MLC Convertible Carry-On 45L Review

December 9, 2025 — The reformed dirtbag’s weekender workhorse. A travel bag that handles camp-smoke flannels, climbing shoes, and dress pants for a wedding toast — all in one overhead-bin-friendly package.

Unencumbered Motion: Patagonia 2024-25 Ski Kit

December 30, 2024 — Moving fast to chase ski conditions in the backcountry is easy and comfortable with Patagonia’s clothing layers — Drew’s layering system for a successful tour.

Patagonia Running Kit 2024-2025

November 20, 2024 — Fall arrived in the Rockies with unseasonably warm temperatures keeping high country trails open deep into the season. Drew’s running kit for rare autumn visits to favorite high-elevation trails.

Fischer Transalp 98 CTI — Like Having Two Freakin Leopards Strapped to Your Feet!

September 20, 2024 — Power and precision in a 1500g touring ski. Drew’s enthusiastic take on a fast, capable ski for the Colorado Front Range backcountry.

Patagonia Cragsmith 45 Liter Climbing Pack — Favorite For the Crag

January 17, 2024 — Drew has used a ton of different packs over the years for schlepping climbing gear. The Cragsmith’s large zippered panel is a significant upgrade over top-loader designs for cragging days.

Patagonia Super Free Alpine Jacket — Light and Durable

December 23, 2023 — An alpine climber’s hardshell: light, durable, and purpose-built for swinging tools, made with next-gen PFC-free waterproof/breathable materials Patagonia developed with Gore.

Scarpa Mescalito Planet Approach Shoe — Rigid and Comfortable

August 18, 2023 — The newest in Scarpa’s sturdy, hiking-oriented approach shoe line. Comfortable on long approaches, climbs well on slabs and cracks, and sturdy enough for wall climbing.

Julbo Density Reactiv Sunglasses — 0-3 Photochromic Awesome Shades

June 8, 2023 — Drew’s take on photochromic sunglass tech — how far it’s come since his first pair over a decade ago, and why the Julbo Density Reactiv set a new bar.

Patagonia Alplight Down Pullover — Fantastic Lightweight Insulation

May 12, 2023 — Patagonia’s entry into the ultralight down category. How does their new Alplight pullover stack up in a crowded field?

Patagonia DAS Light Pants — Lightweight, Packable and Practical

February 13, 2023 — The “micro puff” of pants: packable, lightweight, and practical. A middle ground between bulky down pants and regular layers for cold-weather mountain days.

Patagonia Dirt Roamer Storm Jacket — Great Purpose-built Rain Jacket for a Mountain Bike Enthusiast

December 30, 2022 — The answer to wet-weather trail riding: a lightweight, purpose-built rain jacket designed specifically to keep a rider dry while pedaling a bicycle.

Patagonia Slope Runner Exploration Pack 18L — High Capacity Vest for Epic Days

December 16, 2022 — A runner’s high-capacity vest for technical scrambles and long mountain days — Patagonia’s take on the hybrid running/scrambling vest category.

Patagonia Dirt Roamer Waist Pack — 3L and Great Design

November 11, 2022 — A well-designed waist pack that holds what most mountain bikers need on a ride and carries it tight to the waist — a modern solution to the old backpack-on-a-bike problem.

Nathan Crossover 15L Pack — Great, Light Multi Purpose Pack

October 27, 2022 — A light, low-capacity hiking pack great for run/hike/scramble ventures, bikepacking, and other hybrid activities. Nathan’s first serious hiking/running crossover lineup.

Patagonia Houdini Air — Super Versatile Layer for Aerobic Mountain Sports

July 29, 2022 — Finally, a windbreaker that breathes. Drew’s take on solving the annoying sweat-through-then-get-cold problem of traditional windbreakers.

Showers Pass Apex Merino Tech T-Shirt — Great for a Broad Range of Temperatures

July 5, 2022 — Showers Pass redesigned their lightweight merino wool shirt and released a long sleeve version. Breathable, form-fitting, and versatile across temperatures.

Patagonia Disperser Roll Top 40 — Mostly Waterproof Adventure Pack

March 28, 2022 — A burly, mostly-waterproof 40-liter pack originally aimed at fly fishing, which Drew found handy for a variety of activities.

Patagonia Baby — Quilted Puff Jacket and Synchilla Cardigan

November 4, 2021 — Miniature versions of grown-up Patagonia classics — the Quilted Puff Jacket and Synchilla Cardigan. A rare review from Drew on behalf of his son Baxter.

Scarpa Vapor V Climbing Shoes — Easy On/Off

September 3, 2021 — Comfortable medium-stiffness all-arounders: a road trip “quiver of one.” Semi-soft with an easy on/off velcro closure that molds to the shape of the foot.


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