Icebreaker - Siren Merino Tank Top. Color Gritstone Heather. On sale for $51.39. MSRP $70.00.. 4.9 out of 5 stars+5Brand NameIcebreakerProduct NameSiren Merino Tank TopColorGritstone HeatherPrice$51.39MSRP: $70.00Rating5Rated 5 stars out of 5(10)