In cave and occasionally wreck diving, line markers are used for orientation as a visual and tactile reference on a permanent guide. Commonly referred to as an acute isosceles triangle with notches in the basic outline), they are also known as line arrows or Dorff arrows, and point the way to an exit.

Short-sleeved T-shirt for men made with fine gauge fabric and compacted finish.
Round neck with 4 layers, reinforced seam covers on the neck and shoulders and side seams.
100 % combed single jersey cotton 180 g/m2.

Casual diving shirts made one by one in Spain. Free express shipping in Spain. Original and fun designs for lovers of this underwater sport. T-shirts made of high quality cotton. With fish designs, sport material or with slogans. Unique designs with digital printing. Own illustrations. Original and personalized gift. Buy online the best t-shirts on sale.