Palm Springs in October

Merino or synthetic. Cotton holds the sweat and you'll smell it by day two.

SimondSIMOND Women's Travel 500 Merino Wool T-Shirt$49.99Shop at Decathlon →ForclazSimond Women's Merino Resist Long-Sleeve T-Shirt$45 was $69.99Shop at Decathlon →SimondSimond Women's MT500 Merino Wool T-Shirt$35 was $54.99Shop at Decathlon →SimondSimond Men's MT900 Seamless Merino Wool T-Shirt$45 was $74.99Shop at Decathlon →

Linen or thin synthetic, because a cotton tee soaks through by mid-morning and stays that way.

CotopaxiSolta Long-Sleeve Sun Shirt - Women's$59.50 was $85Shop at Cotopaxi →Outdoor ResearchOutdoor Research Astroman Long-Sleeve Sun Shirt - Men's$60.47 was $110Shop at Backcountry →CotopaxiCambio Button Up Shirt - Men's$30 was $75Shop at Cotopaxi →SimondForclaz Men's MT500 Merino Wool Long-Sleeve Shirt$50 was $84.99Shop at Decathlon →

One pair for every two days, plus two.

SmartwoolEveryday Merino Thong Underwear - Women's$34Shop at Backcountry →SmartwoolEveryday Merino Bikini Underwear - Women's$34Shop at Backcountry →REI Co-opREI Co-op Women's Merino Hipster Underwear$29.95Shop at REI →SimondSimond Trek 500 Merino Wool Backpacking Underwear Women's$29.99Shop at Decathlon →

Trail runners dry overnight where boots take days, which is why most people prefer them on warm trails.

CraftCraft Women's Endurance Trail-Running Shoes$130 was $175Shop at REI →KiprunKiprun Kipride Women's Running Shoes$140Shop at Decathlon →KiprunKiprun Kipsummit Men's Trail Running Shoes$130Shop at Decathlon →QuechuaQuechua Women's MH500 Light Hiking Shoes$80 was $109Shop at Decathlon →

Buy it used: REI Re/Supply sells gear like this for less. See used gear

Get a heel strap. Slides come off on anything steeper than a sidewalk.

KEENKEEN Women's Bali Strap TG Sandals$69.73 was $110Shop at REI →TevaTeva Women's Outflow Closed-Toe Water Sandals$74.73 was $100Shop at REI →ReefReef Water Vista Higher Sandal - Women's$80Shop at Backcountry →ReefReef Water Willow Marina Sandal - Women's$31.47 was $44.95Shop at Backcountry →

Polarized kills glare, but the tag has to say 100% UV separately, and that's the part your eyes need.

SmithSmith Cheetah Polarized Sunglasses - Women's$93 was $155Shop at Backcountry →SmithSmith Era ChromaPop Polarized Sunglasses - Women's$113 was $189Shop at Backcountry →Ray-BanRay-Ban Wayfarer Oval Polarized Sunglasses - Women's$171 was $244Shop at Backcountry →KnockaroundKnockaround Junipers Polarized Sunglasses - Women's$17.50 was $35Shop at Backcountry →

REI Co-opREI Co-op Merino Wool Neck Gaiter$26.95Shop at REI →Turtle FurTurtle Fur Micro Fur Fleece Totally Tubular Neck Gaiter$29.95Shop at Backcountry →SimondSimond Trek 500 Merino Wool Multi-Position Hiking Neck Gaiter$17 was $24.99Shop at Decathlon →BuffBuff x National Parks Coolnet UV Neck Gaiter Great Smoky$24.95Shop at Backcountry →

REI members usually get 10% back on full-price gear. Membership is $30, once. How it works

10,000mAh is about two phone charges, 5,000 barely gets you through one long day.

Top pickGoal ZeroGoal Zero Venture 75 Power Bank$120Shop at REI →BioLiteBioLite Charge 80 PD Power Bank$99.95Shop at REI →AnkerAnker Zolo Power Bank (20,000 mAh, 22.5W, Built-In USB-C Cable)$40Shop at REI →AnkerAnker MagGo Power Bank (10,000 mAh, Slim)$80Shop at REI →

65W or more charges a laptop. Anything smaller only keeps up with phones.

Peak DesignPeak Design 65W Dual Slim Charger$64.95Shop at REI →Peak DesignDual Slim Charger$64.95Shop at Peak Design →AnkerAnker Wall Charger (33W, 2-Port) with USB-C to USB-C Cable$25Shop at REI →AnkerAnker MagGo Wireless Charging Station (3-in-1, Foldable Pad) with Charger and USB-C Cable$100Shop at REI →

35 to 45 liters fits most cabins. Check your airline's size limit first. Most won't take much over 40L in the cabin.

Top pickMatadorMatador 45L Global Travel PackSee price15% off with CHRISANDSARAShop at Matador →MatadorMatador GloberiderSee price15% off with CHRISANDSARAShop at Matador →PacsafeGo Carry-On 44L Backpack$180Shop at Backcountry →Osprey PacksOsprey Packs Archeon 30L Backpack$132 was $265Shop at Backcountry →

Hard shell protects what's inside, soft shell squeezes into a tight bin, and either way check the size with wheels included.

CotopaxiCoraza Suitcase - Carry On$295Shop at Cotopaxi →SamsoniteVirtuosa Spinner$154 was $220Shop at Samsonite →SamsoniteHyperflex ∞ Carry-On Spinner$126 was $180Shop at Samsonite →ThuleThule Aion Carry On Spinner Nutria$350Shop at Backcountry →

15 to 25 liters.

CotopaxiElqui 24L Daypack$100Shop at Cotopaxi →MammutLithium 20L Daypack$135Shop at Backcountry →CotopaxiConsuelo 22L Daypack$120Shop at Cotopaxi →Osprey PacksOsprey Packs Arcane Large 20L Daypack Botanica$65.97 was $110Shop at Backcountry →

Get locks marked TSA approved. Security can cut anything else off to search your bag.

MatadorMatador BetaLockSee price15% off with CHRISANDSARAShop at Matador →KnackKnack TSA-Approved Lock$16Shop at Knack Bags →ThuleTSA Cable Lock$17.95Shop at Backcountry →Samsonite3 Dial Travel Sentry Combination Lock$13Shop at Samsonite →

It runs on Find My, so this one's for iPhones.

AppleApple AirTag (2nd Gen, 4-Pack)$95.99Shop at B&H Photo →AppleApple AirTag (2nd Gen)$29Shop at B&H Photo →eufyeufy SmartTrack Link (2-Pack)$19.99Shop at B&H Photo →

Going in the water, buy the 80-minute one, since 40 minutes is barely one swim.

BadgerBadger SPF 50 Adventure Sport Mineral Sunscreen - 2.4 oz. Tin$18.95Shop at REI →ThinksportThinksport Clear Zinc Active Face SPF 50 Sunscreen$15.95Shop at REI →Blue LizardBlue Lizard Sport Mineral SPF 50 Sunscreen Lotion$14Shop at REI →Sun BumSun Bum Mineral SPF 50 Sunscreen Lotion$17.50Shop at REI →

Look for 300mg of sodium or more, because some of the biggest sports drink brands have almost none.

MaurtenMaurten Drink Mix 320 Unflavored, 14 Single Serve Packets$51Shop at Backcountry →MaurtenMaurten Drink Mix 320 Caf 100 Unflavored, Caffeinated, 14 Single Serve Packets$56Shop at Backcountry →SaltStickFastchews Chewable Electrolyte Tablets - Box of 12 Packets$42Shop at Backcountry →SaltStickFastChews with Caffeine - 10 Count Packets$42Shop at Backcountry →

Picaridin at 20% works as well as DEET, and it won't melt your sunglasses or the plastic on your pack.

Ben'sBen's Eco Spray Insect Repellent - 30 Percent DEET$9.50Shop at REI →Adventure MedicalBen's 30 Deet Tick & Insect Repellent$1.92 was $2.95Shop at Backcountry →Adventure MedicalAdventure Medical Ben's 30 Deet Tick & Insect Repellent Pump$1.92 was $2.95Shop at Backcountry →Ben'sBen's Insect Repellent Wipes - 30 Percent DEET$7.95Shop at REI →