Difference between PLA and PLA+ filament

1KG net (approximately 2.2 lbs) Filament with Black Plastic Spool eSUN PLA PRO 3D Printer Filament Vacuumed Sealed With Desiccant. Superb layer

eSUN PLA PRO (PLA+) 3D Printer Filament, Dimensional Accuracy +/- 0.03 mm, 1kg, Plastic Spool, 1.75mm, Olive Green

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eSUN PLA+ PLA Pro Filament 1.75mm 1kg Reusable Spool For 3D Printer Muilti Color

ESUN Carbon Fiber PLA High Strenth Matte Appearance High Speed for 3D Printer. Resin for 3D Printer. Easy to Print: PLA+ is an enhanced version of

eSUN-2 Rolls-PLA+ PLA PRO PLUS Filaments,1.75mm, 2kg for 3D Printer Multi-color