Skip to content
Pause slideshow
Play slideshow
FREE SHIPPING ON DOMESTIC ORDERS OVER $150
Hassle-free returns and exchanges
icon-X
Close menu
New
Hats
All Hats
New Hats
Fitted
Adjustable
Snapback
Strapback
5 Panel
Unstructured
Dad Hat
Zipperback
Snapback
Full Brim
Bucket
Boonie
Aspen
Denali
Beanie
Kids
Oversized
Apparel
All Apparel
New Apparel
Men
All
New
Hoodies
Shirts
Shorts
Jerseys
Joggers
Outerwear
Women
All
New
Hoodies
Shirts
Crop Tops
Shorts
Yoga Pants
Kimonos
Footwear
Accessories
All Accessories
New
Pins
Patches
Stickers
Koozies
Visor Clips
Socks
Bags
Hydration Packs
Fanny Packs
Backpacks
Dime Bags
Sunglasses
Hat Carriers
Face Covers
Moodmats
Glass
Other
Collections
All Products
Grassroots
Spring / Summer 2025
Fall / Winter 2024
Collaborations
Visual Artists
Musical Artists
Never Summer
Positive Creations
Made To Order
Made to Order Apparel
Made to Order Footwear
Specials
Sales & Promotions
Hats
Apparel
Accessories
Pre-Sale
Subscriptions
Gift Cards
Custom Merch
Log in
instagram
Instagram
Facebook
YouTube
X
Pinterest
Snapchat
Cart
icon-X
Close cart
Order note
Your cart is currently empty.
instagram
Instagram
Facebook
YouTube
X
Pinterest
Snapchat
Language
English
English
Español
Currency
United States (USD $)
Afghanistan (AFN ؋)
Åland Islands (EUR €)
Albania (ALL L)
Algeria (DZD د.ج)
Andorra (EUR €)
Angola (USD $)
Anguilla (XCD $)
Antigua & Barbuda (XCD $)
Argentina (USD $)
Armenia (AMD դր.)
Aruba (AWG ƒ)
Ascension Island (SHP £)
Australia (AUD $)
Austria (EUR €)
Azerbaijan (AZN ₼)
Bahamas (BSD $)
Bahrain (USD $)
Bangladesh (BDT ৳)
Barbados (BBD $)
Belarus (USD $)
Belgium (EUR €)
Belize (BZD $)
Benin (XOF Fr)
Bermuda (USD $)
Bhutan (USD $)
Bolivia (BOB Bs.)
Bosnia & Herzegovina (BAM КМ)
Botswana (BWP P)
Brazil (USD $)
British Indian Ocean Territory (USD $)
British Virgin Islands (USD $)
Brunei (BND $)
Bulgaria (BGN лв.)
Burkina Faso (XOF Fr)
Burundi (BIF Fr)
Cambodia (KHR ៛)
Cameroon (XAF CFA)
Canada (CAD $)
Cape Verde (CVE $)
Caribbean Netherlands (USD $)
Cayman Islands (KYD $)
Central African Republic (XAF CFA)
Chad (XAF CFA)
Chile (USD $)
China (CNY ¥)
Christmas Island (AUD $)
Cocos (Keeling) Islands (AUD $)
Colombia (USD $)
Comoros (KMF Fr)
Congo - Brazzaville (XAF CFA)
Congo - Kinshasa (CDF Fr)
Cook Islands (NZD $)
Costa Rica (CRC ₡)
Côte d’Ivoire (XOF Fr)
Croatia (EUR €)
Curaçao (ANG ƒ)
Cyprus (EUR €)
Czechia (CZK Kč)
Denmark (DKK kr.)
Djibouti (DJF Fdj)
Dominica (XCD $)
Dominican Republic (DOP $)
Ecuador (USD $)
Egypt (EGP ج.م)
El Salvador (USD $)
Equatorial Guinea (XAF CFA)
Eritrea (USD $)
Estonia (EUR €)
Eswatini (USD $)
Ethiopia (ETB Br)
Falkland Islands (FKP £)
Faroe Islands (DKK kr.)
Fiji (FJD $)
Finland (EUR €)
France (EUR €)
French Guiana (EUR €)
French Polynesia (XPF Fr)
French Southern Territories (EUR €)
Gabon (XOF Fr)
Gambia (GMD D)
Georgia (USD $)
Germany (EUR €)
Ghana (USD $)
Gibraltar (GBP £)
Greece (EUR €)
Greenland (DKK kr.)
Grenada (XCD $)
Guadeloupe (EUR €)
Guatemala (GTQ Q)
Guernsey (GBP £)
Guinea (GNF Fr)
Guinea-Bissau (XOF Fr)
Guyana (GYD $)
Haiti (USD $)
Honduras (HNL L)
Hong Kong SAR (HKD $)
Hungary (HUF Ft)
Iceland (ISK kr)
India (INR ₹)
Indonesia (IDR Rp)
Iraq (USD $)
Ireland (EUR €)
Isle of Man (GBP £)
Israel (ILS ₪)
Italy (EUR €)
Jamaica (JMD $)
Japan (JPY ¥)
Jersey (USD $)
Jordan (USD $)
Kazakhstan (KZT ₸)
Kenya (KES KSh)
Kiribati (USD $)
Kosovo (EUR €)
Kuwait (USD $)
Kyrgyzstan (KGS som)
Laos (LAK ₭)
Latvia (EUR €)
Lebanon (LBP ل.ل)
Lesotho (USD $)
Liberia (USD $)
Libya (USD $)
Liechtenstein (CHF CHF)
Lithuania (EUR €)
Luxembourg (EUR €)
Macao SAR (MOP P)
Madagascar (USD $)
Malawi (MWK MK)
Malaysia (MYR RM)
Maldives (MVR MVR)
Mali (XOF Fr)
Malta (EUR €)
Martinique (EUR €)
Mauritania (USD $)
Mauritius (MUR ₨)
Mayotte (EUR €)
Mexico (USD $)
Moldova (MDL L)
Monaco (EUR €)
Mongolia (MNT ₮)
Montenegro (EUR €)
Montserrat (XCD $)
Morocco (MAD د.م.)
Mozambique (USD $)
Myanmar (Burma) (MMK K)
Namibia (USD $)
Nauru (AUD $)
Nepal (NPR Rs.)
Netherlands (EUR €)
New Caledonia (XPF Fr)
New Zealand (NZD $)
Nicaragua (NIO C$)
Niger (XOF Fr)
Nigeria (NGN ₦)
Niue (NZD $)
Norfolk Island (AUD $)
North Macedonia (MKD ден)
Norway (USD $)
Oman (USD $)
Pakistan (PKR ₨)
Palestinian Territories (ILS ₪)
Panama (USD $)
Papua New Guinea (PGK K)
Paraguay (PYG ₲)
Peru (PEN S/)
Philippines (PHP ₱)
Pitcairn Islands (NZD $)
Poland (PLN zł)
Portugal (EUR €)
Qatar (QAR ر.ق)
Réunion (EUR €)
Romania (RON Lei)
Rwanda (RWF FRw)
Samoa (WST T)
San Marino (EUR €)
São Tomé & Príncipe (STD Db)
Saudi Arabia (SAR ر.س)
Senegal (XOF Fr)
Serbia (RSD РСД)
Seychelles (USD $)
Sierra Leone (SLL Le)
Singapore (SGD $)
Sint Maarten (ANG ƒ)
Slovakia (EUR €)
Slovenia (EUR €)
Solomon Islands (SBD $)
Somalia (USD $)
South Africa (USD $)
South Georgia & South Sandwich Islands (GBP £)
South Korea (KRW ₩)
South Sudan (USD $)
Spain (EUR €)
Sri Lanka (LKR ₨)
St. Barthélemy (EUR €)
St. Helena (SHP £)
St. Kitts & Nevis (XCD $)
St. Lucia (XCD $)
St. Martin (EUR €)
St. Pierre & Miquelon (EUR €)
St. Vincent & Grenadines (XCD $)
Sudan (USD $)
Suriname (USD $)
Svalbard & Jan Mayen (USD $)
Sweden (SEK kr)
Switzerland (CHF CHF)
Taiwan (TWD $)
Tajikistan (TJS ЅМ)
Tanzania (TZS Sh)
Thailand (THB ฿)
Timor-Leste (USD $)
Togo (XOF Fr)
Tokelau (NZD $)
Tonga (TOP T$)
Trinidad & Tobago (TTD $)
Tristan da Cunha (GBP £)
Tunisia (USD $)
Türkiye (USD $)
Turkmenistan (USD $)
Turks & Caicos Islands (USD $)
Tuvalu (AUD $)
U.S. Outlying Islands (USD $)
Uganda (UGX USh)
Ukraine (UAH ₴)
United Arab Emirates (AED د.إ)
United Kingdom (GBP £)
United States (USD $)
Uruguay (UYU $U)
Uzbekistan (UZS so'm)
Vanuatu (VUV Vt)
Vatican City (EUR €)
Venezuela (USD $)
Vietnam (VND ₫)
Wallis & Futuna (XPF Fr)
Western Sahara (MAD د.م.)
Yemen (YER ﷼)
Zambia (USD $)
Zimbabwe (USD $)
icon-search
Search
icon-hamburger
Site navigation
account
Log in
icon-search
Search
Cart
New
Hats
All Hats
New Hats
Fitted
Adjustable
Snapback
Strapback
5 Panel
Unstructured
Dad Hat
Zipperback
Snapback
Full Brim
Bucket
Boonie
Aspen
Denali
Beanie
Kids
Oversized
Apparel
All Apparel
New Apparel
Men
All
New
Hoodies
Shirts
Shorts
Jerseys
Joggers
Outerwear
Women
All
New
Hoodies
Shirts
Crop Tops
Shorts
Yoga Pants
Kimonos
Footwear
Accessories
All Accessories
New
Pins
Patches
Stickers
Koozies
Visor Clips
Socks
Bags
Hydration Packs
Fanny Packs
Backpacks
Dime Bags
Sunglasses
Hat Carriers
Face Covers
Moodmats
Glass
Other
Collections
All Products
Grassroots
Spring / Summer 2025
Fall / Winter 2024
Collaborations
Visual Artists
Musical Artists
Never Summer
Positive Creations
Made To Order
Made to Order Apparel
Made to Order Footwear
Specials
Sales & Promotions
Hats
Apparel
Accessories
Pre-Sale
Subscriptions
Gift Cards
Custom Merch
Search
Search
Killer Acid
Size
S
(3)
S/M
(5)
M
(3)
L
(3)
L/XL
(5)
XL
(3)
2XL
(3)
3XL
(3)
OSFM
(4)
N/A
(4)
Category
Hat
(9)
Apparel
(3)
Accessory
(4)
Vendor
Grassroots California
(16)
Filter
icon-X
Close menu
Size
S
(3)
S/M
(5)
M
(3)
L
(3)
L/XL
(5)
XL
(3)
2XL
(3)
3XL
(3)
OSFM
(4)
N/A
(4)
Category
Hat
(9)
Apparel
(3)
Accessory
(4)
Vendor
Grassroots California
(16)
icon-filter
Filter
16 products
Sort
Sort
Featured
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Date, old to new
Date, new to old
Quick view
Killer Acid Mushroom Tan Dad Hat
$35.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Pink Dad Hat
$35.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Tan Snapback Hat
$50.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Pink Snapback Hat
$55.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Black Snapback Hat
$55.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Furry Reversible Bucket Hat
$60.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Friends Reversible Bucket Hat
$55.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Blue Cuff Beanie
$25.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Yellow Pom Beanie
$25.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Blue Tie Dye T Shirt
$60.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Yellow T Shirt
$55.99
icon-X
"Close (esc)"
Sold Out
Quick view
Killer Acid Mushroom Black Mesh Shorts
$55.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Yellow Bong Pin
$10.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Blue Bug Pin
$10.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Pink Cluster Pin
$10.99
icon-X
"Close (esc)"
Quick view
Killer Acid Mushroom Triple Blue Pin
$10.99
icon-X
"Close (esc)"
Sign up and save
Enter your email
Subscribe
Subscribe
icon-right-arrow
icon-X
"Close (esc)"
icon-X
icon-chevron
icon-X
Killer Acid
