Koolgear is Hard Yakka's range of lightweight, ventilated shirts, pants and shorts engineered to keep you cool in hot, physically demanding environments. Engineered with naturally breathable and lightweight 145gsm 100% cotton twill, these shirts feature ventilation in three high heat areas - side body, underarm and back body - for the ultimate in cooling. Never lose your pen again, with the handy pen partition built into the chest pocket. Finally, this shirt helps keep odours at bay - the 100% polyester mesh used in the ventilation zones is treated with microbiobial finish to fight odour causing bacteria. No matter what the day throws at you, this shirt has your back! Naturally breathable and lightweight 100% cotton twill; 145gsm Fade Shade Indicator (Patent Approved) - serves as an indicator for hi-visibility non-compliance Features Reflectec reflective tape Chest pockets with pen partition to meet storage needs Hard Yakka's most ventilated shirt; with ventilation at underarm, side body and back body for the ultimate in comfort and cooling 100% polyester mesh with microbiobial finish to fight odour causing bacteria Size Chart NECK Measure around the neck where the top of the short collar would sit. CHEST Standing naturally, measure around the fullest part of the chest and shoulder, under the arms with your arms at resting position. WAIST Measure over undergarments at the natural waistline ( usually approx. 1cm below the navel ). Measure from crotch to floor, with shoes. MEN'S SHIRTS Sizes 2XS XS S M L XL 2XL 3XL To fit neck (cm) 32/33 34/35 36/37 38/39 41/42 43/44 45/46 47/48 To fit neck (inches) 12 13 14 15 16 17 18 18.5 To fit chest (cm) 82 87 92 97 102 107 112 117 To fit chest (inches) 32 34 36 38 40 42 44 46 Sizes 4XL 5XL 6XL 7XL 8XL To fit neck (cm) 49/50 51/52 53/54 55/56 57/58 To fit neck (inches) 19 20 21 21.5 22.5 To fit chest (cm) 122 127 132 137 142 To fit chest (inches) 48 50 52 54 56