The Garmin Instinct 2S is the smaller-cased sibling of the Instinct 2, a rugged outdoor GPS smartwatch built to US MIL-STD-810 durability standards for hikers, campers and outdoor users who prefer a smaller wrist footprint. It has a 40mm case with a monochrome, always-on transflective MIP display at 156 x 156px, wrist heart rate, Pulse Ox, and the same broad set of outdoor and fitness tracking modes as the full-size Instinct 2, finished in this Graphite colourway. It measures 40 x 40 x 13.3mm and weighs 43g, and is rated 10 ATM water resistant. Battery life is naturally shorter than the larger Instinct 2 due to its smaller battery: up to 21 days in smartwatch mode and around 22 hours in standard GPS mode. This is the standard (non-solar) 2S — an Instinct 2S Solar model exists with a solar-charging lens for extended battery life, but is not this exact SKU. A good fit for someone who wants Instinct's tough, simple, long-lasting design on a smaller wrist.