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    • Home / Altitude Range / Page 1 of 2

      Category

      Product type

      Fit

      BEST FOR

      Gender

      Men's and Women's Altitude Thermal Base Layers

      The Altitude Collection is where it all started for io and includes some of our all-time best sellers like the Women's Altitude Crew and the Men's Altitude Zip. Originally designed for snow and on-mountain sports, this range quickly become our jack-of-all-trades, go-to thermal base layer. With 96% superfine, temperature regulating merino and a snug, contact fit, the Altitude Range is the perfect lightweight thermal layer for core warmth when you’re layering up, but just as comfortable worn on its own in milder conditions if you don’t mind a figure hugging fit. (If you’re looking for all the performance in a regular or casual fit, try our Ultra or Universal ranges!) Which is why people who know, go with io. Because it’s incredible outside.

      Altitude Crew
      Altitude Crew $110.00 AUD
       
       
       
       
       
       
      Altitude 'Stripey' Crew
      Altitude 'Stripey' Crew $110.00 AUD
       
      Altitude Neck Warmer
      Altitude Neck Warmer $35.00 AUD
       
       
       
       
       
       
       
       
       
       
       
       
      Altitude Zip
      Altitude Zip $120.00 AUD
       
       
       
       
       
      Altitude Crew
      Altitude Crew $110.00 AUD
       
       
       
       
       
       
       
       
      Altitude Crew - Run All The Trails Original
      Altitude Crew - Run All The Trails Original $110.00 AUD
       
       
      Altitude Zip - Live To Run Back
      Altitude Zip - Live To Run Back $120.00 AUD
       
      Altitude Zip
      Altitude Zip $120.00 AUD
       
       
       
       
       
       
       
      Altitude Tee - Southern Cross
      Altitude Tee - Southern Cross $100.00 AUD
       
      Altitude Tee
      Altitude Tee $100.00 AUD
       
       
       
       
       
      Altitude Tee
      Altitude Tee $100.00 AUD
       
       
       
       
       
       
      Altitude Tee - Run All The Trails Original
      Altitude Tee - Run All The Trails Original $100.00 AUD
       
      Altitude 'Stripey' Tee
      Altitude 'Stripey' Tee $100.00 AUD
       
      Altitude Hooded Zip
      Altitude Hooded Zip $135.00 AUD
       
       
      Altitude Crew - Live To Run Front
      Altitude Crew - Live To Run Front $110.00 AUD
       
      Altitude Crew - Live To Run Back
      Altitude Crew - Live To Run Back $110.00 AUD
       
      Altitude 'Mongrel' Crew
      Altitude 'Mongrel' Crew $130.00 AUD
       
       
      Altitude Briefs - Ready For Adventure
      Altitude Briefs - Ready For Adventure $45.00 AUD
       
       
       
       
       
      Altitude Boxers - Heavy Duty
      Altitude Boxers - Heavy Duty $60.00 AUD
       
      Altitude Crop - Ready For Adventure
      Altitude Crop - Ready For Adventure $65.00 AUD
       
       
       
       
      Altitude Hooded Zip
      Altitude Hooded Zip $135.00 AUD
       
       
      Altitude 'Mongrel' Zip
      Altitude 'Mongrel' Zip $135.00 AUD
       
       
       
      Altitude 'Mongrel' - Outsider Edition
      Altitude 'Mongrel' - Outsider Edition $130.00 AUD
       
      Altitude Tights - Ready For Adventure
      Altitude Tights - Ready For Adventure $105.00 AUD
       
      Altitude Tights - Ready For Adventure
      Altitude Tights - Ready For Adventure $105.00 AUD
       
      Altitude 'Stripey' Zip
      Altitude 'Stripey' Zip $120.00 AUD
      Altitude Crew - Live To Run Front
      Altitude Crew - Live To Run Front $110.00 AUD
      Altitude Crew - Live To Run Back
      Altitude Crew - Live To Run Back $110.00 AUD
      Altitude 'Mongrel' - Outsider Edition
      Altitude 'Mongrel' - Outsider Edition $130.00 AUD
      Altitude 'Mongrel'
      Sold out
      Altitude 'Mongrel' $105.00 AUD $130.00 AUD
      Sold Out
      Altitude Crew - Run All The Trails
      Altitude Crew - Run All The Trails $110.00 AUD
      Altitude Crew - Run All The Trails
      Altitude Crew - Run All The Trails $110.00 AUD
      Altitude 'Mongrel'
      Altitude 'Mongrel' $130.00 AUD
      Altitude Crew - Run All The Trails Original
      Altitude Crew - Run All The Trails Original $110.00 AUD
      Altitude Tank - Keepin' It Real
      Altitude Tank - Keepin' It Real $80.00 AUD
      Altitude Tank - Live To Run
      Altitude Tank - Live To Run $80.00 AUD
      Altitude Zip - Live To Run Back
      Altitude Zip - Live To Run Back $120.00 AUD
      Altitude Racer Back Tank
      Altitude Racer Back Tank $80.00 AUD
      Altitude Tank
      Altitude Tank $80.00 AUD
      Altitude 'Stripey' Racer Back Tank
      Altitude 'Stripey' Racer Back Tank $80.00 AUD
      Altitude 'Mongrel' Tee
      Altitude 'Mongrel' Tee $110.00 AUD
      Altitude 'Mongrel' Tee
      Altitude 'Mongrel' Tee $110.00 AUD
      Altitude Tee - Southern Cross
      Altitude Tee - Southern Cross $100.00 AUD
      Altitude Tee - Live To Run Front
      Altitude Tee - Live To Run Front $100.00 AUD
      Altitude Tee - Live To Run Back
      Altitude Tee - Live To Run Back $100.00 AUD
      Altitude Tee - Live To Run Back
      Altitude Tee - Live To Run Back $100.00 AUD
      Altitude Tee - Run All The Trails
      Altitude Tee - Run All The Trails $100.00 AUD
      Altitude Tee - Live To Run Front
      Altitude Tee - Live To Run Front $100.00 AUD

      All Altitude layers are designed to be longer in the body to tuck into your outer layers or sit over bottom layer so you don’t have exposed cold spots when you’re on the go. Ideal for bike riding where you’re bending over and you don’t want your top to ride up, and on mountain sports to avoid any exposed skin. 

      The Altitude Range is ‘contact fit’ to maximise thermal properties and sit flat under other layers. Made with 96% superfine Australian Merino and 4% Elastane to give extra stretch. Designed to be body-hugging and tight all over.

      These layers are perfect for snow sports, cycling and running. 

      For a looser fit base layer, try out Ultra Collection. 

       

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      Let customers speak for us

      from 2035 reviews
      Icy run

      I wore iormerino Altitude thermals (x3 layers top) and x1 layer bottom (with running tights) with x2 pairs of socks for running adventure across a frozen lake in Mongolia. Light weight and warm despite -18/-22 degrees. I didn't need ski jacket or pants as felt cosy. Didn't smell either (we had no running water for 7 days).

      HOANG LY
      ioMerino

      These are the most comfortable socks i have owned. Will definetly be recommending them. More purchases in the future .

      Deanne
      No Show Socks
      Great Tank

      Nice fabric - fits well.

      Michael Truelove
      Celsius Tank
      Cute

      I ordered one size up as advised in the product description and it fits perfectly. I love the stripes. Have not yet worn it on a run due to weather but I love wool and expect it to perform well.

      Erika Thomas
      Altitude 'Stripey' Racer Back Tank

      Feel amazing on. True to size and love the two side pockets. Will purchase again.

      Kym Weidner
      Pace Compression Bike Shorts

      Reliable brand. Great quality. Australian. This would be the fifth pair purchased for this household. Highly recommend.

      m.f.
      Stride Tracksuit Pants
      Socks

      Very comfortable and breathable socks.
      The fit and size are spot on.

      clare stacey
      No Show Socks
      Perfect T

      I’ve not worn a T in my life that works like the IO. From Exmouth to Adelaide this T worked as described by the company

      Stephen Boyd
      Universal Tee - Austrailio
      Raglan Tops - Outstanding Value

      Great for a cold weekend away (at Wonderland), or smart to wear at work with a Pinnacle Top. Such good quality, I bought 2 if each. The colour has not faded after 3 years wear.

      Jennifer Watkins
      Zone Raglan
      Arm warmers

      Highly recommended. Non-slip, snug, warm, comfortable and I love the Peaks & Trails logo!

      Greg Kew
      Pace Arm Warmers - Peaks & Trails

      Warm, snug, great colour

      Joan Tibballs
      Altitude Crew

      The only socks I wear for work, they feel great and never smell.

      David
      Hiking Socks
      Black yoga pants xxl

      Very comfortable , great length , fantastic for travel, would recommend, great quality

      Bernadette Hogan
      Yoga Pants

      They are great, warm, and comfortable even while running.

      Ann Dohnt
      Altitude Neck Warmer
      First impressions

      Good fit good comfort

      Clifford Grove
      Altitude Boxers - Ready for Adventure