Easy-care yarns that you would never know are acrylic. My recommended soft knitting and crochet yarns you can machine wash and dry.
Two Ways to Soften Your Stiff and Scratchy Acrylic Yarn - FeltMagnet
Premium soft cotton milk yarn - the best material for Amigurumi and crochet projects. Makes yarn creations clearer and more defined for years. Strong, super-soft, durable and shiny fiber that's easier to work with and lasts longer.This yarn is pure cotton yarn that goes through a special processing with milk proteins, which results in a 80% cotton and 20% milk-fiber. This process creates much softer threads compared to standard cotton yarn.
LovLim Yarn Pack, 2 Skeins of 50g Each, Soft Cotton Yarn for Crochet and Knitting, Craft Dk Amigurumi Yarn (Bright Pink)
DIY Wool: Forage, Spin and Dye Your Own Yarns : 49 Steps (with Pictures) - Instructables
My Honest Review of Caron Simply Soft Yarn (worth it?) - Little World of Whimsy
10 Affordable Best Yarn for Crochet Sweaters - KKAME Designs
The BEST Yarn for Crochet Beginners: A COMPLETE Guide - sigoni macaroni
Tahki Yarns Cotton Classic Yarn at WEBS
Content Solids: 100% Acrylic, Care: This yarn for knitting, crocheting, amigurumi and craft projects is easy to care for, simply machine wash and dry
Red Heart Super Saver Brushed Cream Yarn - 3 Pack of 140g/5oz - Acrylic - 4 Medium (Worsted) - 255 Yards - Knitting/Crochet
How to Turn Second Hand or Dirty Yarn Into Usable Stash : 5 Steps (with Pictures) - Instructables